U.S. Navy Submarine Events in June (1900–1939)
- 4 June 1913 – USS H-2 (SS-29) launched: The H‑class submarine originally named Nautilus was launched at Union Iron Works, San Francisco. USS H-2 later served on the West Coast and in Caribbean patrols during WWI.

Official USN photo # NH 99351, from the collections of the Naval Historical Center.
