How many people fought in the Afghanistan war?

The Afghanistan War, which began in 2001, involved a coalition of forces led by the United States, with contributions from NATO and various allied nations. Over the years, hundreds of thousands of troops from numerous countries participated in the conflict, with estimates suggesting that around 800,000 U.S. service members alone were deployed at various times. Additionally, many Afghan military and police personnel, as well as insurgent groups, were also involved, making it difficult to determine an exact total number of combatants across all factions.