Operation teardrop was a united states navy operation of world war ii conducted during april and may 1945 to sink german u-boats approaching the united states east. Rms lusitania was a british ocean liner that a german submarine sank in world war i, causing a major diplomatic uproar. the ship was a holder of the blue riband, and. Looking to download free maps of western australia? find pdf map links and everything you are looking for here at wa holiday guide..