Fort San Jose was a military fortification established by the Spanish in the 18th century, located in what is now California. It served as a strategic outpost to protect Spanish interests and facilitate trade along the California coast. The fort was part of a broader network of missions and presidios aimed at expanding Spanish influence in the region. The fort featured adobe walls and was designed to house soldiers and supplies. Although it was eventually abandoned, Fort San Jose played a significant role in the early history of California and the interactions between European settlers and Indigenous peoples.