Thousands of Marines are heading to the Middle East as the United States weighs whether to deepen its role in Iran as part of a military buildup leading to more questions about possible ground troops or missions tied to the Strait of Hormuz.

Add Yahoo as a preferred source to see more of our stories on Google. On the heels of fielding the military’s first attack drone team, the U.S. Marine Corps added another weapon to their drone-fighting arsenal: a 90-page handbook all about employing ...