Greater Serbia the Kingdom of Serbia retreated from Durrës in April 1913 under pressure of the naval fleet of Great Powers, but it remained in other parts of Albania for the next two months. The secret military society called Unity or Death, popularly known as the Black Hand, headed by Serbian colonel Dragutin Dimitrijević Apis, which took an active and militant stance on the issue of a Greater Serbian state. This organization is believed to have been responsible for numerous atrocities following the Balkan Wars in 1913. In 1914, Young Bosnia member Gavrilo Princip assassinated Archduke Franz Ferdinand in Sarajevo, which set
.380 ACP 42; all three being designed to be lighter than blowback operated .380 ACP weapons. There have also been some relatively diminutive (blowback-operated) submachine guns, such as the Ingram MAC-11 and the Czech vz. 83. The .380 ACP has experienced very widespread use in the years since its introduction (1908 United States, 1912 Europe). In 1914, it was used by Gavrilo Princip to assassinate Archduke Franz Ferdinand and his wife Sophia, the event which is credited with starting World War I. It was later adopted by the armies of at least five European nations as their standard pistol cartridge before World