US forces wargamed defending a Pacific ally from invasion with layers of firepower. Here's how the drills played out.

Source: Business Insider

Notable firsts include the use of Japan's Type-88 surface-to-ship missile system outside Japanese territory and the first launch of a Tomahawk missile from the Army's Typhon system abroad. US Marine Corps photo by Sgt. Jonathan BeauchampThe US military and its allies recently wargamed a Pacific fight, an invasion scenario.