Fort McGilvray was a United States military fortification located on Caines Head, a cliff 650 feet above Resurrection Bay south of Seward, Alaska. The United States Army established a series of defensive positions along the coast of the bay during World War II to defend Seward against a possible Japanese invasion. The bay was a strategically important location, as it remained ice-free throughout the year, and Seward served as the southern terminus of the Alaska Railroad, an important route for transporting civilian and military supplies throughout the territory.