Contiguous United States
On the night of June 21–22, 1942, the Japanese submarine "I-25" surfaced off Fort Stevens and fired 17 shells from her 14 cm-calibre deck gun, making Fort Stevens the first military installation in the Contiguous United States to come under enemy fire in World War II. The Japanese attack caused no damage to the fort itself, it only destroyed the backstop of the post's baseball field.