In all, 22. D.C., of course, is a special case in the United States, being a federal district rather than a state. But as its own entity, it has its own department - the Department of District of Columbia.

D.C.'s Post 1 is not just D.C.'s. The post's page on the Centennial Celebration site lists it as "The American Legion's first chartered post." It received its initial charter on May 19, 1919, less than two weeks after the St. Louis Caucus.