FAS

Costs of Major U.S. Wars Compared

07.19.10 | 1 min read | Text by Steven Aftergood

More than a trillion dollars has been appropriated since September 11, 2001 for U.S. military operations in Iraq, Afghanistan and elsewhere.  This makes the “war on terrorism” the most costly of any military engagement in U.S. history in absolute terms or, if correcting for inflation, the second most expensive U.S. military action after World War II.

A newly updated report from the Congressional Research Service estimated the financial costs of major U.S. wars from the American Revolution ($2.4 billion in FY 2011 dollars) to World War I ($334 billion) to World War II ($4.1 trillion) to the second Iraq war ($784 billion) and the war in Afghanistan ($321 billion).  CRS provided its estimates in current year dollars (i.e. the year they were spent) and in constant year dollars (adjusted for inflation), and as a percentage of gross domestic product.  Many caveats apply to these figures, which are spelled out in the CRS report.

In constant dollars, World War II is still the most expensive of all U.S. wars, having consumed a massive 35.8% of GDP at its height and having cost $4.1 trillion in FY2011 dollars.  See “Costs of Major U.S. Wars,” June 29, 2010.

publications
See all publications
Government Capacity
Blog
Everything You Need to Know (and Ask!) About OPM’s New Schedule Policy/Career Role: Oversight Resource for OPM’s Schedule Policy/Career Rule

This rule gives agencies significantly more authority over certain career policy roles. Whether that authority improves accountability or creates new risks depends almost entirely on how agencies interrupt and apply it. 

02.13.26 | 8 min read
read more
Government Capacity
Policy Memo
Report
Rebuilding Environmental Governance: Understanding the Foundations

Our environmental system was built for 1970s-era pollution control, but today it needs stable, integrated, multi-level governance that can make tradeoffs, share and use evidence, and deliver infrastructure while demonstrating that improved trust and participation are essential to future progress.

02.12.26 | 26 min read
read more
Government Capacity
Policy Memo
Report
Costs Come First in a Reset Climate Agenda

Durable and legitimate climate action requires a government capable of clearly weighting, explaining, and managing cost tradeoffs to the widest away of audiences, which in turn requires strong technocratic competency.

02.12.26 | 41 min read
read more
Environment
Press release
FAS Launches New “Center for Regulatory Ingenuity” to Modernize American Governance, Drive Durable Climate Progress

FAS is launching the Center for Regulatory Ingenuity (CRI) to build a new, transpartisan vision of government that works – that has the capacity to achieve ambitious goals while adeptly responding to people’s basic needs.

02.12.26 | 4 min read
read more