What are the key differences between the U.S. Army and the Marine Corps, in particular during WW1, WW2 and the Vietnam wars

by [deleted]

I would like to know what makes these two branches distinguishable from one another, and how each factored into America's wars.

Georgy_K_Zhukov

More can be said, but our FAQ has some entried which might be of use for you. This might also help you for WWI.