The seas are considered cruel mistresses, so it's necessary for one to either stay clear or be prepared to face their unpredictable wrath. Considering that the surface of the planet consists of 71% water, it's probably in the US military's best interest to be prepared to perform on land and at sea.
Here are 17 pictures that show how it trains for amphibious warfare:
SEE ALSO: How China's navy rapidly modernized to rival the US's
US Marines conduct a nighttime boat operation exercise using a Combat Rubber Raiding Craft aboard the USS Green Bay.
An instructor with the Animal Packers Course sings the "Marines' Hymn" after completing a plunge into freezing water as part of the Winter Mountain Leaders Course.
Recon Marines enter the water with their ankles bound and hands clenched tightly together during a proficiency screening at Camp Schwab in Japan.
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