A term used for people who opposed secession of the states were called conservatives. The people that supported secession were called secessionists.
Chat with our AI personalities
Many respected senior citizens in the Southern states disapproved strongly of secession, and one of them was Robert E. Lee.
In and after World War 2 and for time afterwards the term good Germans was used in English-speaking countries for Germans who were opposed to the Nazi regime.
Yankee refered to the Union (Northen) Troops and people. It was meant as a slur and a bad term, and was used by the Confederates.
The term used by southerners for a return to Democratic white rule was redeemers.
During World War 2, a "Yank" referred to an American soldier. The term was often used by civilians and other military personnel from different countries to refer to American servicemen. The term "Yank" was derived from "Yankee," a term used to describe people from the United States.
If you mean used it in an act of warfare, as opposed to a test, the only country to do so has been the USA (Hiroshima and Nagasaki, 1945)