German immigration to Argentina occurred during five main time periods: pre–1870, 1870–1914, 1918–1933, 1933–1940 and post–1945. In the first period numbers were generally low; of note are the "colonias alemanas", first founded in the province of Buenos Aires in 1827. During the second period, Argentina experienced a boom in immigration due to massive economic expansion in the port of Buenos Aires and the wheat and beef producing Pampas. German immigrants began establishing themselves and developing newspapers, schools, and social clubs. A new, Germanic-Argentine identity gradually developed among the population.