This drink is included in the International Sours category, meaning that it needs to have liquor base and some lemon or lime and has to be swetened by a liqueur, another fruit juice or both.
The Canteen Martini was created by Joey Guerra, bartender at the Canteen restaurant in New York city. It doesn't have a long history and is not a classic, but is a tasty drink combining the Southern Comfort liqueur and the amaretto with a liquor not so strong as a base.
1 1/2 ounce white rum
1 1/2 ounce Southern Comfort
1/2 ounce amaretto
1/2 ounce fresh lime juice