List of coastal fortifications of the United States

The United States and the colonies that preceded it built numerous coastal defenses to defend major cities, ports and straits from the colonial era through World War II. Some listed were built by other nations and are now on United States territory. == United States fortification programs == === Colonial period through 1885 === In the American colonies and the United States, coastal forts were generally more heavily constructed than inland forts, and mounted heavier weapons comparable to those on potential attacking ships.

Source: Wikipedia — List of coastal fortifications of the United States (CC BY-SA 4.0)