Amphibious War (Civ3)/Civilopedia

A combined land and sea attack, usually associated with the capture of a beachhead or coastal area, is known as amphibious warfare. First 
attempted by the ancient Persians during the Battle of Marathon in 490 BC, successful coordination of amphibious assaults are considered to 
be among the most complex military operations. When ship-mounted guns were developed, naval vessels would open fire on ground forces 
and gun emplacements while merchant ships were used to land troops and supplies. The first modern amphibious assault took place at 
Gallipoli during World War I. Poorly planned and executed, this assault failed, but served as an example of the need for perfect coordination 
of forces in this type of attack. As battlefield communications improved, and the range of ship-mounted weapons increased, amphibious 
warfare became increasingly successful, and played a vital role in World War II. Today, amphibious operations are augmented by fast, 
armored landing vehicles; hovercraft that are capable of moving troops to and across the beach; and airborne assistance from planes and 
helicopters.