- This article is about the part of the military. For the colour see Navy blue.
The navy is the part of a country's military that fights on water using boats. People in the navy are called sailors. The navy is mostly made up of warships. It may also have its own air force and soldiers. It also may have special boats that can go underwater, called submarines.
Originally, Naval war was fought by ramming other ships and then boarding them. In Ancient Greece and Rome, the ships were usually powered by oars. Then, during the Middle Ages, the cannon was invented. These could be shot at other ships from a great distance. Ships around this time also began to use sails instead of oars for power. In the 1800s, ships began to be plated in armor for protection. This also required a change in their power because they became heavier. Steam engines were used. These early warships, called ironclads, are thought to have begun the type of Naval warfare used today.
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