John Ross has a character in Unintended Consequences asserting the IRA never had more than 200 active members at a time; they kept an island the size of Arkansas tied up for decades.
I’ve seen estimates that we’re fighting less than 500 “active” Taliban and 2,000 “support” Taliban in Afghanistan. How many troops do we have there, chasing them?
I like what General Crook said long ago: “Chasing the Apaches with the US Army is like hunting deer with a brass band.”