World War I Chronology, July 1918: Only Enemy Shells Fired on U.S. Coast

JULY 21, 1918--  ONLY ENEMY FIRE TO LAND IN AMERICA

German submarine U-18 fires at the United States tug Perth Amboy off the Orleans, Massachusetts coast.  It also fired at targets on the land.

The VFW April 2018 magazine had it as the U-18, but the U-18 was sunk in 1914.  Most likely, it was U-156 which fired on the American mainland.

--Cooter