With the outbreak of World War I in 1914, the school faced significant anti-German sentiment by the local populace despite Director Jesse's support as a Four Minute Man. In a demonstration of their American pride, the school changed the language of all its classes to English and constructed a flagpole, said to be the tallest in the county. After the war, the school was accredited as a junior college and became co-ed in 1919 although women boarded with families off-campus. In December 1918, the Lutheran Seminary, as the university was then named, suffered infection during the 1918 flu pandemic with at least 15% of the student body being infected and one student dying. The school suffered another less-severe outbreak in 1920.