The Trump administration’s FY 2019 budget proposal laid out a set of priorities. To pay for these initiatives, the FY 2019 defense budget rose 14 percent above the FY 2017 level. The Congress generally endorsed the administration's approach. However, the choices showed that there is no escaping the tradeoff among readiness, modernization, and force structure. This study examines the changes in the FY 2019 budget for each of the military services, DOD civilians, and contractors, how the budget shapes the forces, and the challenges ahead for building and maintaining the forces needed to implement the administration's stated strategy.

Annually, CSIS senior adviser Mark Cancian publishes a series of papers on U.S. military forces—their composition, new initiatives, long-term trends, and challenges. The overall theme of this year’s report is the struggle to align forces and strategy because of budget tradeoffs that even defense buildups must make, unrelenting operational demands that stress forces and prevent force structure reductions, and legacy programs whose smooth operations and strong constituencies inhibit rapid change. This report takes a deeper look at the strategic and budget context, the military services, special operations forces, DOD civilians and contractors, and non-DOD national security organizations in the FY 2020 budget.

CSIS senior adviser Mark Cancian annually produces a series of white papers on U.S. military forces, including their composition, new initiatives, long-term trends, and challenges. This report is a compilation of these papers and takes a deep look at each of the military services, the new Space Force, special operations forces, DOD civilians, and contractors in the FY 2021 budget. This report further includes a foreword regarding how the Biden administration might approach decisions facing the military forces, drawing on insights from the individual chapters.

"Analysis of the FY 2019 Defense Budget" from the CSIS Defense Budget Analysis program provides an in-depth assessment of the Trump administration’s request for national defense funding in FY 2019. In addition to analyzing the request for the upcoming fiscal year and the Department of Defense’s projections for the future, the report assesses long-term trends in defense funding levels by spending title and Service as well as changes in the military’s force structure over time.