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Fiscal Receipts

Guam Defense Development

MDARDT&EPartial Reconciliation0604102C

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What it is
Guam Defense Development (0604102C) is a MDA research & development line funded in the Research, Development, Test and Evaluation, Defense-Wide account. Its J-book detail breaks the line into 3 projects.
What changed
-$242.8M FY25→26 R-1 TOA · PB2026
Who gets it
No award linkage at high confidence.

Budget Figures

FY24 Actuals
$554.5MR-1 TOA · PB2026
FY25 Total
$415.8MR-1 TOA · PB2026
FY26 Request
$173.0MR-1 TOA · PB2026
25.7% reconciliation

$128.5M discretionary + $44.5M one-time reconciliation. Discretionary change vs FY2025 enacted: -69.1%.

FY25→26 Change
-$242.8MR-1 TOA · PB2026

Two official figures, one label— reconciled below

Fiscal Receipts uses P-1/R-1 workbook total obligation authority (TOA) as the headline figure sitewide. The workbook TOA includes budget rows (such as advance procurement) that the R-2/P-40 J-book program line excludes. How the two bases relate →

FY26 Request · $173.0M TOA − $128.5M J-book line = 44.5M (173.0128.5 = 44.5)

Figures in the sentence are rounded for reading; the parenthesised arithmetic is the same subtraction in USD millions, at the precision where it closes.

FY2026 award data is a partial year — USASpending awards are reported on a rolling basis and the fiscal year does not close until September 30. why partial FY2026 data? →

Budget Trajectory
The program's 3 summary figures for FY24 to FY26, plotted in fiscal-year order so the direction of travel is readable at a glance: this line ends lower than it starts. The points are the summary cards above, not a separate derivation; the table beside the chart carries each figure with its own citation.
The program's 3 summary figures for FY24 to FY26, plotted in fiscal-year order so the direction of travel is readable at a glance: this line ends lower than it starts. The points are the summary cards above, not a separate derivation; the table beside the chart carries each figure with its own citation.FY24: $554.5MFY25: $415.8MFY26: $173.0MFY24FY25FY26
Budget trajectory: one row per fiscal year, carrying the summary figure the sparkline plots. Every figure opens its own citation.
Fiscal yearAmount
FY24$554.5M
FY25$415.8M
FY26$173.0M

All series figures: R-1 TOA · PB2026

Decade view — P-1/R-1 workbook TOA basis, shown compact in $B/$M (the workbook records USD thousands); each figure cites its own President's Budget edition
7 fiscal years of this program as published (FY2020–FY2026): a line through the actuals (filled dots), with the enacted (hollow circles) and request (diamonds) markers each edition reported. Read it for direction, not for precision — this program's actuals line rises across the span. The grid below is the same data as text, one cited figure per cell.
7 fiscal years of this program as published (FY2020–FY2026): a line through the actuals (filled dots), with the enacted (hollow circles) and request (diamonds) markers each edition reported. Read it for direction, not for precision — this program's actuals line rises across the span. The grid below is the same data as text, one cited figure per cell.FY2020 actuals — PB2022 editionFY2021 actuals — PB2023 editionFY2022 actuals — PB2024 editionFY2023 actuals — PB2025 editionFY2024 actuals — PB2026 editionFY2021 enacted — PB2022 editionFY2022 enacted — PB2023 editionFY2023 enacted — PB2024 editionFY2024 enacted — PB2025 editionFY2025 enacted — PB2026 editionFY2022 request — PB2022 editionFY2023 request — PB2023 editionFY2024 request — PB2024 editionFY2025 request — PB2025 editionFY2026 request — PB2026 editionFY20FY21FY22FY23FY24FY25FY26

The vertical scale does not start at zero: the baseline sits just below this program’s smallest year, so a low point on this line is not a small amount. Read the shape for direction and the grid below for the figures.

● actuals (line)  ·  ○ enacted  ·  ◇ request — gaps are editions the program is absent from, never interpolated.

Decade series values by fiscal year and President's Budget edition: one row per series (actuals, enacted, request), one column per fiscal year. Every figure opens its own citation.
SeriesFY20FY21FY22FY23FY24FY25FY26
Actuals$0$0$110.6M$383.3M$554.5M
Enacted$0$112.4M$393.2M$397.6M$415.8M
Request$78.3M$397.9M$397.6M$415.8M$173.0M

blank = series not published for this year; – = absent from that edition.

Asked vs spent: the PB2024 book requested $397.6M for FY2024; the PB2026 book reported $554.5M as actual total obligation authority — $156.9M above the request. 554.5397.6 = 156.9 USD millions — the compact figures above are rounded for reading.

Program Lineage

No predecessor/successor lineage was recorded for this program element — no FY-to-FY transfer into or out of this line was stated in the ingested J-books, and none was inferred from the program structure.

Description

Mission Guam Defense Development

This program develops a Missile Defense System for the Defense of Guam (DoG) against ballistic, hypersonic, and cruise missile threats as a high priority mission for the Department of Defense. The Missile Defense System will form a key part of strategic deterrence and supports the PDI. In FY 2022, the Missile Defense Agency (MDA) initiated studies and analysis, architecture development and siting analysis. FY 2023 continued architecture development and increased the development and modification of the distributed radar, Aegis Guam System support, environmental studies, site design, activation and advanced planning. In FY 2024, the program leveraged the results of studies and analysis to continue developing and fielding of distributed land-based launchers, distributed sensors, and integrated communications across Guam. The acquisition approach is to balance costs and associated risks in order to provide increased Aegis Weapon System development for Guam integration, site activation, environmental protection, engineering, and interoperability. FY 2025 continues the advancements of FY 2024 completing an on-island flight experiment in early FY 2025, continued Environmental Studies and Mitigations, and continuation of the software development phase for the Aegis and Radar components. The activities in FY 2026 include development and integration efforts between MDA, United States (U.S.) Army (USA), U.S. Navy (USN), and U.S. Air Force (USAF) systems, which includes a 360 degree persistent integrated air and missile defense Aegis Guam System with distributed Mk-41 Vertical Launching Systems, and a single Tactical Array Unit (TAU) Army Navy/Transportable Radar Surveillance and Control-6 (AN/TPY-6) and missile uplink/downlink communications system for the DoG. Aegis Guam System will develop capability to leverage track data from Army systems, that is provided via the Joint Track Management Capability - Bridge (JTMC-B), to support Standard Missile-6 Engage on Remote (EoR) capability. The Guam Architecture will be commanded and controlled from the Joint Command Center with additional Integrated Air and Missile Defense Battle Command System; Aegis Guam System; Command and Control, Battle Management and Communications mission node and Tactical Operations Center - Light providing local continuity of operations. Initial Aegis Guam System capability was demonstrated on Guam in calendar year (CY) 2024. Aegis Guam System with additional Terminal Defense capability will be delivered in CY 2029.

Mission Cyber Operations

Guam on-island Cyber team coordinates local network defense activities and assumes responsibility to defend onsite assets from active or imminent cyberspace threats in the event of degraded communication conditions. This Budget Project provides the oversight and inter-Agency/Service coordination for Cyber activities needed for integrating a capability to defend Guam against ballistic, hypersonic, and cruise missile attack.

Mission Program Wide Support

PWS contains non-headquarters management costs in support of Missile Defense Agency (MDA) functions and activities across the entire Missile Defense System. These functions include Government Civilians and Contract Support Services. This effort provides integrity and oversight of the Missile Defense System as well as supports MDA in the development and evaluation of technologies that will respond to the changing threat. Additionally, PWS includes personnel to support global deployments performing deployment site preparation and activation, and provides facility capabilities for MDA Executing Agent locations worldwide. Other MDA wide costs include: physical and technical security; civilian drug testing; audit readiness; the Science, Technology, Engineering, and Mathematics (STEM) program; legal services and settlements; travel and agency training; office, equipment, vehicle, and warehouse leases; utilities and base operations across multiple geographic locations; commercial and ancillary facility services; management of all facility aspects regardless of lifecycle stage; supplies and maintenance; compliance with statutory environmental requirements; data and unified communications support; materiel and readiness and central property management of equipment; Facilities Sustainment, Restoration and Modernization (FSRM) program (formerly Real Property Maintenance) to keep the Department's inventory of facilities in good working order; and similar operating expenses. PWS is allocated on a pro-rata basis across most Agency PEs; therefore, fluctuates per PE by FY based on the total Agency budget in that FY.

Mission Defense of Guam Development

This program develops a Missile Defense System for the Defense of Guam (DoG) against ballistic, hypersonic, and cruise missile threats as a high priority mission for the Department of Defense. The Missile Defense System will form a key part of strategic deterrence and supports the PDI. In FY 2022, the Missile Defense Agency (MDA) initiated studies and analysis, architecture development and siting analysis. FY 2023 continued architecture development and increased the development and modification of the distributed radar, Aegis Guam System support, environmental studies, site design, activation and advanced planning. In FY 2024, the program leveraged the results of studies and analysis and continued developing and fielding of distributed land-based launchers, distributed sensors, and integrated communications across Guam. The acquisition approach is to balance costs and associated risks in order to provide increased Aegis Weapon System development for Guam integration, site activation, environmental protection, engineering, and interoperability. FY 2025 continues the advancements of FY 2024, with the completion of an on-island flight experiment in early FY 2025, continued Environmental Studies and Mitigations, and the continuation of the software development phase of the Aegis and Radar components. The activities in FY 2026 include development and integration efforts between MDA, United States (U.S.) Army (USA), U.S. Navy (USN), and U.S. Air Force (USAF) systems, which includes a 360 degree persistent integrated air and missile defense Aegis Guam System with distributed Mk-41 Vertical Launching Systems, and a single Tactical Array Unit (TAU) Army Navy/Transportable Radar Surveillance and Control-6 (AN/TPY-6) and missile uplink/downlink communications system for the DoG. Aegis Guam System will develop capability to leverage track data from Army systems, that is provided via the Joint Track Management Capability - Bridge (JTMC-B), to support Standard Missile-6 (SM-6) Engage on Remote (EoR) capability. The Guam Architecture will be commanded and controlled from the Joint Command Center with additional Integrated Air and Missile Defense Battle Command System; Aegis Guam System; Command and Control, Battle Management and Communications mission node and Tactical Operations Center - Light providing local continuity of operations. Initial Aegis Guam System capability was demonstrated on Guam in calendar year (CY) 2024. Aegis Guam System with additional Terminal Defense capability will be delivered in CY 2029.

Justification

Accomplishments & Planned Programs (6)

Guam Cyber Support

Guam on-island Cyber team coordinates local network defense activities and assumes responsibility to defend onsite assets from active or imminent cyberspace threats in the event of degraded communication conditions. This Budget Project provides the oversight and inter-Agency/Service coordination for Cyber activities needed for integrating a capability to defend Guam against ballistic, hypersonic, and cruise missile attack. Specific and/or unique accomplishments to each FY are as follows:

Program Wide Support

PWS contains non-headquarters management costs in support of MDA functions and activities across the entire Missile Defense System. These functions include Government Civilians and Contract Support Services. This effort provides integrity and oversight of the Missile Defense System as well as supports MDA in the development and evaluation of technologies that will respond to the changing threat. Additionally, PWS includes personnel to support global deployments performing deployment site preparation and activation, and provides facility capabilities for MDA Executing Agent locations worldwide. Other MDA wide costs include: physical and technical security; civilian drug testing; audit readiness; the STEM program; legal services and settlements; travel and agency training; office, equipment, vehicle, and warehouse leases; utilities and base operations across multiple geographic locations; commercial and ancillary facility services; management of all facility aspects regardless of lifecycle stage; supplies and maintenance; compliance with statutory environmental requirements; data and unified communications support; materiel and readiness and central property management of equipment; the FSRM program to keep the Department's inventory of facilities in good working order; and similar operating expenses. PWS is allocated on a pro-rata basis across most Agency PEs; therefore, fluctuates per PE by FY based on the total Agency budget in that FY. Specific and/or unique accomplishments to each FY are as follows:

Guam Radar Development and Integration

Develop, procure, deliver, and integrate distributed land-based radar capability for use in acquiring, tracking, identifying, and discriminating threats to Guam, including the necessary on-island support equipment for power, data communications to Aegis Guam system, cooling, and environmental protection. Provide transportation, delivery, integration, testing, operations, and limited spares. Planned activities include: - Develop land-based radar system. - Fabricate radar system component acquisition, including Active Electronically Scanned Array antenna subsystems, power conversion and storage subsystems, mission processing subsystems, and radar signal processing subsystems for multiple distributed operating locations. - Design and acquisition of radar environmental protection (Radomes & Mission Module Complexes). Specific and/or unique accomplishments to each FY are as follows:

Program Operations

Provides the program management oversight and inter-Agency/Service coordination to integrate a capability to defend Guam against ballistic and cruise missile attack. Activities involve coordination with the Office of Secretary of Defense Guam Joint Program Executive Office, USN, USA, United States Indo-Pacific Command, and the island of Guam to evaluate complex architecture integration activities. Specific and/or unique accomplishments to each FY are as follows:

Guam Site Environmental, Activation and Advanced Planning

The Environmental, Site Activation, and Advanced Planning accomplishment funds all efforts for Guam defense to complete the environmental impacts and assessments as required by federal Laws. Performs geotechnical, topographical, environmental, and unexploded ordnance efforts to support siting of Guam defense assets. Performs advance planning and site preparation for required military construction on Guam. Performs site activation and facilities sustainment. Activities include: - Conduct advance planning activities for Enhanced Integrated Air and Missile Defense site construction on Guam. - Conduct site activation and other on island support including procurement of site specific equipment. - Conduct environmental impact studies and assessments activities. - Conduct Munitions and Explosives of Concern (MEC) investigations and removal actions. Specific and/or unique accomplishments to each FY are as follows:

Guam Weapon System Engineering

Provide Aegis Guam System (AGS) architecture and systems engineering activities necessary to provide an integrated air and missile defense system on Guam against ballistic missile threats. Activities include threat engineering, specifications development, software validation and verification, usage at development test sites, modeling and simulations, risk management, pre-mission test analysis, performance analysis, and baseline management and control. Activities include: - Conduct required system feasibility analysis. - Maintain Systems Modeling Language model to support AGS development and technical reviews. - Provide Modeling & Simulation (M&S) of advanced threats, including development of threat models and tools, and produce threat data for simulations. - Develop system-level design and specifications for Guam Defense. - Develop Guam-specific M&S framework updates and tailor core truth models for ground and flight test. - Develop and integrate of M&S required for Defense of Guam (DoG) performance assessment. - Provide system test requirements and planning documents for Guam defense. - Conduct accreditation activities for models and M&S framework to be used in DoG performance assessment. - Design & development of AGS enclosures and finalize transportation plans. - Design & development of Command, Control, Communications, Computers, & Intelligence enclosure, towers and integration plans. - Concept of Operations development for AGS, including electro-magnetic interference mitigation, and commercial air traffic de-confliction. - Development of training and logistics, including technical publications and transportation requirements, for support plans for AGS optimizes existing capabilities and easily adapted for Lead Service use. - AGS system requirements development, trace, and establish configuration management for coordination with all participating external agencies and organizations. - BMDS Test Site laboratory upgrades necessary to ensure DoG Surrogate/HWIL availability required for DoG Program baseline development, demonstrations and testing. - Development and Integration & Test laboratories upgrades necessary to ensure DoG Program integrated baseline development, demonstrations and testing at Original Equipment Manufacturer development, test and integration site. - Development of initial AGS technical publications necessary to inform the design, development, installation and maintenance activities in a format to be used as the basis for final facilities design and for reference in future warfighter decisions. - Shipment of materials/parts/systems/sub-systems necessary to establish the Development and Integration & Testing laboratories, as well as equipment delivery to Guam in support of FEM-02 conducted December 2024. - Define AGS requirements necessary to achieve compliance with Missile Defense System requirements and participate in DoG requirements review including element level, as well as Multi-Element level integration testing. - Conduct Aegis compliance threat space and performance analysis to inform requirements development and optimize AGS performance as a part of the overall Guam Defense architecture that will leverage Army systems to support SM-6 EoR capability. - Design and code of new electronic protection techniques that take advantage of solid-state radar technologies. - Design and development of new radar adaptation data, fire control calculation changes to support remote launchers, encrypted communication methods between AGS components, and modular Guam Defense System Operations Center components. - Coordinate with external stakeholders and agencies supporting AGS weapons system requirements for Satellite Communications interoperability and Internet Protocol services. - Develop detailed system-level design and interface specifications for Guam Defense. - Conduct AGS Cyber Security Testing. - Develop and provide specifications to integrate Flight Experiment Mission -02 site into larger Guam Defense System. - Design and development of AGS SM-6 EoR capability that is reliant on the Army systems supporting the overall engagement performance. Specific and/or unique accomplishments to each FY are as follows:

Budget Line Items(workbook-cited)

P-1/R-1 workbook Total Obligation Authority basis (USD thousands) · PB2026.

Exhibit R-1

AccountOrgTypeAmount
Research, Development, Test and Evaluation, Defense-WideMDAFY24 Actuals$554.5M
Research, Development, Test and Evaluation, Defense-WideMDAFY25 Enacted$415.8M
Research, Development, Test and Evaluation, Defense-WideMDAFY25 Total$415.8M
Research, Development, Test and Evaluation, Defense-WideMDAFY26 Disc. Request$128.5M
Research, Development, Test and Evaluation, Defense-WideMDAFY26 Reconciliation$44.5M
Research, Development, Test and Evaluation, Defense-WideMDAFY26 Total$173.0M

Budget Details(R-2/P-40 facts)

J-book detail basis (R-2/P-40, USD millions) · PB2026 — a different accounting basis from the P-1/R-1 workbook TOA above; where the two disagree, the reconciliation strip under Budget Figures shows both.

Wider than this screen — swipe the table sideways for the remaining fiscal-year columns.

ProjectAll Prior YearsFY24 ActualsFY25 TotalFY26 BaseFY26 Request
Program Element$203.1M$554.5M$415.8M$128.5M$128.5M
MC65: Cyber Operations$0$0$0$7.28M$7.28M
MD40: Program Wide Support$1.70M$12.4M$16.0M$5.98M$5.98M
MD65: Defense of Guam Development$201.4M$542.1M$399.8M$115.2M$115.2M

No follow-the-dollar view — this program's awards haven't been crosswalked at high confidence (flows cover 17 of 1,741 programs). why coverage is partial? →

Awards

No awards are linked to this program element at high confidence — the budget→award crosswalk only asserts links it can defend, and this line has none yet.

Lobbying Mentions

No Senate LDA lobbying filing in the tracked data mentions this program element by code or alias.

Oversight

Department-level designation (not specific to this program)

GAO lists 5 high-risk areas for DOD as a whole. That designation covers the department, not Guam Defense Development — no program-specific GAO finding for this line is in the ingested data. See the DOD oversight record.

No research dossier for this program — dossiers cover 50 of 1,741 programs, the largest fully J-book-detailed lines by FY2026 requested dollars. why no dossier here? →