Major General Henry Pinckney McCain was an officer in the United States Army who served as Adjutant General of the Army from 1914 to 1918.

Carroll County is a county in the U.S. state of Mississippi. As of the 2020 census, the population was 9,998. Its county seats are Carrollton and Vaiden. The county is named for Charles Carroll of Carrollton, the last surviving signatory of the Declaration of Independence.