The Pittsburgh Agreement was a memorandum of understanding completed on 31 May 1918 between members of Czech and Slovak expatriate communities in the United States of America. It is named for the city of Pittsburgh, Pennsylvania, where the agreement was made. The agreement prescribed the intent of the cosignatories to create an independent Czechoslovakia. This was achieved on 18 October 1918, when the primary author of the agreement, Tomáš Garrigue Masaryk, declared the independence of Czechoslovakia. Masaryk was elected the first president of Czechoslovakia in November, 1918.
The historical setting of the Pittsburgh Agreement was the impending dissolution of the Austro-Hungarian Empire in the months prior to the end of World War I. By September, 1918, it was evident to many that the forces of the Habsburg monarchy, the rulers of Austria-Hungary, would be vanquished by the Allies: Britain, France and Russia. Between 1860 and 1918, close to one million people of Slovak and Czech ethnicity migrated to the United States and to other nations. At the time, these immigrants were officially recorded as Austrians or Hungarians (Magyars), which did not accurately reflect their culture and ethnic origin. The United States allowed Czech and Slovak nationalist groups to form and operate. On 22 October 1915 (approximately three months after the commencement of hostilities in World War I), at the Bohemian National Hall on Broadway, Cleveland, Ohio the Slovak League of America and the Bohemian (Czech) National Alliance signed the Cleveland Agreement. With this, the two groups agreed to work together towards a united and independent state for Czechs and Slovaks.