At it's peak, 100,000 American troops were brought/pulled in. Great Job! -> You can also use draw as a form of art, business, school Ex: She draws the most amazing pictures! They are so life-like Ex: I drew a diagram for the meeting at work. Ex: I drew, using a computer graphics program for a class in school.

without having more context I believe drawing=pulling in or attracting "A celebrity draws a crowd"

I believe that "drawing" means "bringing together" in this sentence.

In this instance it is functioning as a verb and it means "to pull in" or "require the use of". "Draw" can be used as both a noun or a verb so how it is used is dependent on the context of the sentence.