Oscar Mike to the glossary. Copy that.
A broad geographic area where military operations occur—referred to as 'theater of operations' or 'theater of war.' It's a war zone, but with a fancy strategic term.
A narrow excavation in the ground, typically rectangular with smooth walls, used in military warfare as protective cover or in archaeology to unearth buried secrets. Think of it as nature's filing cabinet, but way more dangerous depending on your neighbors.
A brutal military hazing ritual where an entire unit wraps soap bars in towels and uses them as improvised weapons to teach a recruit a painful lesson for getting everyone in trouble—basically peer-administered, extralegally sanctioned justice in boot camp.