Colonial fortifications were military structures built by European powers during the age of exploration and colonization. These forts were designed to protect settlements, trade routes, and resources from rival nations and indigenous groups. Common features included thick walls, bastions, and moats, which provided defense against attacks. Many colonial fortifications were constructed in strategic locations, such as near rivers or coastlines. Notable examples include Fort Ticonderoga in North America and Castillo de San Marcos in Florida. These structures played a crucial role in the military strategies of colonial powers like Spain, France, and Britain.