evidence: Outer Mongolia was a Chinese province (1691-1911), an autonomous state under Russian protection (1912-19), and again a Chinese province (1919-21). As Manchu authority in China waned, and as Russia and Japan confronted each other, Russia gave arms and diplomatic support to nationalists among the Mongol religious leaders and nobles. The Mongols accepted Russian aid and proclaimed their independence of Chinese rule in 1911, shortly after a successful Chinese revolt against the Manchus. By agreements signed in 1913 and 1915, the Russian Government forced the new Chinese Republican Government to accept Mongolian autonomy under continued Chinese control, presumably to discourage other foreign powers from approaching a newly independent Mongolian state that might seek support from as many foreign sources as possible.