From its establishment in 1892 until the 1920s the largest Finnish ethnic church in the United States, the Finnish Evangelical Lutheran Church in America, better known as the Suomi Synod, was among the staunchest defenders of Finnish language and culture. The synod built a network of Sunday and summer schools, coordinated by the Michigan-based Suomi College, that not only offered religious instruction but also spread the Finnish language and national romantic ideals to immigrant children. Tightening immigration laws and increasing demands for national unity in the 1920s led many immigrant institutions, including the ethnic Lutheran churches, to Americanisation. A debate concerning a language reform also started in the Suomi Synod, but was rejected by the nationalistic-minded wing. Adherence to the Finnish language alienated the younger generation and led to a drastic but temporary decline in the church’s membership.