Franz Sigel (November 18, 1824 – August 21, 1902) was a German military officer, revolutionist and immigrant to the United States. In the US he was a teacher, newspaperman, politician, and served as a Union Major general in the American Civil War. His ability to recruit German-speaking immigrants to the Union armies got him the approval of President Abraham Lincoln. But he was strongly disliked by General-in-Chief Henry Halleck and rated overall as a poor leader.