The Pact of Petrograd is a military alliance that was formed by the Russian Empire to combat the French-led Continental Alliance, which Russia withdrew from, and the so-called American bloc, which became the Concert of Democracies. The alliance was formed in 1950 in Petrograd when the leaders of Russia, China, Siam-Burma, and Novorossiya met in the Russian capital. The official de facto leader is Russia, with the three other original signatory members being China, Siam-Burma, and Novorossiya.