American troops were known As?

It's unknown exactly how U.S. service members in World War I (1914-18) came to be dubbed doughboys—the term most typically was used to refer to troops deployed to Europe as part of the American Expeditionary Forces—but there are a variety of theories about the origins of the nickname.Sep 28, 2018

Explanation:

watching over my siblings so they are safe.

because he is that the right