Conventional wisdom holds that the American military is overwhelmingly conservative and Republican, and extremely political. Our Army paints a more complex picture, demonstrating that while army officers are likely to be more conservative, rank-and-file soldiers hold political views that mirror those of the American public as a whole, and army personnel are less partisan and politically engaged than most civilians.

Assumptions about political attitudes in the U.S. Army are based largely on studies focusing on the senior ranks, yet these senior officers comprise only about...