 In 1915 he was called up for military service - to be a sailor on the Ioann Zlatoust, a battleship in the Russian Black Sea Fleet.He did a lot of sports in the Navy, was a champion in French boxing and wrestling, and knew jiu-jitsu well, he was able to defeat any opponent with a quick capture without much stress.During his time in the navy, he became influenced by anarcho-communism.