After World War I, residential construction boomed. Between 1922 and 1934, 28 "Gemeindebauanlagen" (community housing projects/municipal apartment complexes) with more than 4,517 apartments were constructed. Among this number were the 1,587 apartments of the "Sandleitenhof", which was the largest apartment complex in Vienna to date. The economic collapse of the 1930s brought great adversity to the district with unemployment surging to over 50%. The brief Austrian Civil War of 1934 brought major instability and fighting to the region. The local insurgency overpowered the army of the original Social Democratic Party, and the residential buildings escaped mostly unharmed. There was however heavy fighting around the workers' housing in the "Kreitnergasse" Street.