People fight on the sea. 

People have fought on the sea for a long time. 
Groups use big boats to stay safe. They also use boats to move goods. 
In the past, ships would ram each other. This helped them win battles. 
Later, people used gunpowder on ships. This changed how they fought.
Sea battles left many shipwrecks behind. We can find them under the water today.
People have fought on the sea for over 3,000 years. 
In ancient times, ships were used to ram others. 

Later, ways of fighting changed. In the late 1500s, people used gunpowder. This meant ships used heavy guns instead of just ramming.
Different groups ruled the seas at different times. The Romans built a large navy to control the Mediterranean Sea. 
Naval warfare is combat that happens on the sea or large bodies of water. 

For most of history, fighting at sea was about two main things. Sailors often tried to board enemy ships or stop others from boarding them. 

Humans have fought battles on the sea for more than 3,000 years. 

Different empires used navies to grow their power. The Roman Republic learned to fight at sea during the Punic Wars. They used a technique to grapple and board enemy ships. By the time of the Battle of Actium in 31 BC, hundreds of ships were used. Later, Muslim fleets became very strong in the Mediterranean Sea. In 1275, an inventor named Hasan al-Rammah created a new tool. He invented a torpedo in Syria that used rockets and gunpowder. 
Naval history is also important for people who study the past today. Many old sea battles left behind many shipwrecks on the ocean floor. 

Naval warfare is combat occurring in and on the sea, the ocean, or any large body of water. This includes wide rivers and massive lakes. The branch of armed forces dedicated to these operations is known as a navy. Experts often categorize naval operations by their strategic scope. A "brown-water navy" focuses on riverine or littoral areas near the coast. A "blue-water navy" operates in the open ocean. Between these two is the "green-water navy," which works in the areas between the coast and the deep sea. 
The primary strategic goal of naval warfare is the projection of force by water. This means using ships to move military power to different locations. The defensive purpose is to challenge the similar projection of force by an enemy. Historically, controlling waterways was essential for the development of the modern world. In places like the United Kingdom and America, navigable waterways allowed for the bulk movement of goods. This movement of raw materials supported the early Industrial Revolution. Before 1750, most materials moved via sea vessels or river barges. 
For most of history, naval tactics centered on two main concerns: boarding and anti-boarding. Sailors would attempt to jump onto enemy vessels to fight hand-to-hand. This changed in the late 16th century due to gunpowder technology. As heavy ordnance, or large guns, developed, the tactical focus shifted from boarding to long-range combat. In earlier eras, ships often used a method called ramming. They used a reinforced prow, which is the front part of the ship, to strike an opponent. 
Humanity has fought sea battles for over 3,000 years. One of the earliest recorded conflicts was the Battle of the Delta. In this battle, Ancient Egyptians defeated the Sea Peoples using a naval ambush. They used archers firing from both ships and the shore to win. Later, the Greeks engaged in large-scale operations against the Persian Empire. The Athenian leader Themistocles used silver from the Laurium mines to fund a massive fleet. In 480 BC, the Greeks won a decisive victory at the Battle of Salamis. 
Different civilizations developed unique ways to master the sea. The Roman Republic was not originally a seafaring nation. However, they learned to fight during the Punic Wars with Carthage. Romans developed techniques to grapple and board enemy ships with soldiers. By the Battle of Actium in 31 BC, hundreds of ships were involved in combat. These ships, such as quinqueremes, featured fighting towers and catapults. 

Other groups used the water for different strategic purposes. The Vikings were known for raiding and pillaging. They often attacked undefended locations along the coastlines of England and France. They also used rivers to travel far inland to reach areas like Northumbria. Eventually, King Alfred the Great halted these invasions after the Battle of Edington. In the Byzantine Empire, the invention of "Greek fire" helped save Constantinople. This was an early form of flamethrower that was devastating to enemy ships. 
Naval history remains a vital field for modern science and archaeology. Many ancient sea battles have left behind significant shipwrecks on the ocean floor. Underwater archaeology uses these sites to study the past. For example, researchers explore warship wrecks in the Pacific Ocean. These discoveries provide physical evidence of how technology and tactics evolved. From ancient triremes to modern dreadnoughts, the sea has shaped human history. 
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