|Reza Kahn arrived in Teheran on February 22, commanding of an army of 4,000 troops. His forces toppled the government and he became the new leader of Persia. His government renounced its agreement with the British. Reza Khan then entered into an agreement with the Soviets that called for the Soviets to withdraw from Persia and allowed Persia to abrogate all concessions. In 1925 Reza Khan became Reza Shah Pahlavi. He followed a policy of modernization and development in Persia.