Greater than 50%
Allow its merchant shipping to be sunk and its citizens to be killed by German U-Boats.
103 merchant ships were sunk in world war one
Well over a dozen US Navy riverine boats were sunk in the Vietnam War; Swift Boats (PCF); PBRs (Patrol Boat River), Alpha Boats (ASPB-Assault Support Patrol Boats); unknown number of Monitors sunk, if any. The ex-USN Aircraft Carrier USS Card was sunk by communist sappers in harbor in South Vietnam.
Amigir
Japanese zeros carried torpedoes on their planes
Greater then 50%
The last merchant ship sunk in Word War II was the Japanese Kashima Maru which went down on August 14, 1945. It was sunk by a mine dropped by a U.S. Army Air Force plane.
Allow its merchant shipping to be sunk and its citizens to be killed by German U-Boats.
IJN subs were deployed for "fleet warfare", not merchant raiding. The costly job of sinking allied warships fell to the IJN sub fleet. It's estimated that IJN submarines sank less than 50 merchant ships during the war.
103 merchant ships were sunk in world war one
The U.S. sunk: The Akagi The Kaga The Soryu The Hiryu The Japanese sunk: The Yorktown
Well over a dozen US Navy riverine boats were sunk in the Vietnam War; Swift Boats (PCF); PBRs (Patrol Boat River), Alpha Boats (ASPB-Assault Support Patrol Boats); unknown number of Monitors sunk, if any. The ex-USN Aircraft Carrier USS Card was sunk by communist sappers in harbor in South Vietnam.
Kaga, Soryu, Akagi and Hiryu.No Japanese battleships were sunk at Midway, the four mentioned above were sunk but they were Aircraft Carriers, not battleships.
These merchantmen are KNOWN to be sunk by Japanese submarines during WWII off the US West Coast (there are several others sunk by explosions, but cannot be verified as sunk by submarines):1941 - Emidio, tanker, torpedoed1941 - Montebello, tanker, torpedoed1942 - Coast Trader, freighter, torpedoed1942 - Larry Doheny, tanker, torpedoed
It was sunk at Pearl Harbor, Hawaii on December 7, 1941 by the Japanese.
Amigir
USS Johnston ship