Action of 17 February 1864
Part of the American Civil War
Date February 17, 1864 Location Charleston Harbor, Charleston, South Carolina Result Confederate victory
Belligerents
	U.S. Navy
Strength
1 submarine	1 sloop-of-war
Casualties and losses
	unknown human casualties, 1 sloop-of-war sunk

The Action of 17 February 1864 was an important turning point in naval warfare. On this night the Confederate States Navy submarine, CSS Hunley made her first and only attack on a Union Navy warship. CSS Hunley is responsible for the first sinking of an enemy vessel with a submarine, thus beginning the era of submarine warfare.