 The result was the population almost doubled from 15,600 in 1897 to 30,400 in 1913.In early 1914, the largest oil company Royal Dutch Shell was established in the city thus making Grozny one of the largest industrial centers of the Caucasus.One day after the October Revolution, on November 8, 1917, the Bolsheviks headed by N. Anisimov seized Grozny.