The contributions of our foreign allies to the Afghanistan War have been overlooked or downplayed throughout the 20-year conflict. But in proportion to their size, many of them committed more troops and funds, and suffered more casualties, than even the U.S.
The 9/11 attacks were the first time NATO invoked Article 5 of its treaty, which enshrines the principle of “collective defense” by recognizing an attack against one ally as an attack against all allies. Thus, all the other 29 members of NATO—along with 21 partner countries ranging from Australia to South Korea—contributed troops, money, and other aid to the war in Afghanistan.
(It is also worth adding that even the typically-deadlocked U.N. Security Council resoundingly supported American retaliation, indicating an exceptionally rate amount of international support.)
Besides the U.S., the top five countries to send troops were the United Kingdom, Germany, France, Italy, and Canada. The U.K. in particular supplied roughly two to three times the troops of the other top contributing allies relative to its population.
British and Canadian troops put their lives at risk at twice the rate of American troops, when seen as a percentage of each country’s peak deployment. Proportionally, both suffered more than double the casualties of U.S. forces, while France suffered a similar rate.
As proportion of their military, many smaller countries played an outsized role, with Denmark, Estonia, Georgia, Norway, and North Macedonia ranking near the top after the U.S. and U.K.; consequently, some of these countries suffered the highest fatality rates per capita.
The top contributing allies lost over a thousand lives in U.S.-led conflicts in Afghanistan as well as Iraq; all told, roughly half of all foreign military deaths in Afghanistan were among U.S. allies.
When measured as a percentage of their annual baseline military spending, the U.K. and Canada spent roughly half as much on Afghanistan as the U.S.; relative to their overall economic size, the U.K. spent more than the U.S., while Germany and Canada spent about the same.
This did not have to be our allies’ fight. The likes of Georgia, Norway, and South Korea (among dozens of others) had little to no skin in the game, aside from a broader sense that terrorism could potentially impact them. But even then, involvement would put them at greater risk of retaliation and domestic opposition (as Spain learned the hardest way when it lost nearly 200 lives in a terrorist attack perpetrated in response to its participation in Iraq).