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In page Ernestine Schumann-Heink:

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During World War I, she supported the United States and its armed forces. She entertained the troops and raised money for Liberty Bonds, as well as "the Red Cross, knights of Columbus, Young Men's Christian Association, and Jewish War Relief, and to entertaining soldiers Throughout the United States"[1] in order to help wounded veterans. She toured the United States raising money for the war effort, although she had relatives fighting on both sides of the war – including her sons August Heink, a merchant sailor who had been impressed into the German submarine service, Walter Schumann, Henry Heink and George Washington Schumann, all in the United States Navy.[citation needed]