In the aftermath of the King-Crane Commissions, events on the ground took their own course. President Wilson asked the United States Congress for the authority to establish a mandate for Armenia on May 24, 1920. The United States Senate rejected his request by a vote of 52 to 23 on June 1, 1920. In September 1920, the Turkish–Armenian War broke out. The First Republic of Armenia was defeated in November 1920 and signed the Treaty of Alexandropol under which it renounced the Treaty of Sèvres along with various territorial claims to "Western Armenia". The government of Armenia was subsequently overthrown. The new Armenian government signed the Treaty of Kars, which reaffirmed the previous Armenian concessions to Turkey and determined the modern-day borders between the two countries.