Great Northern Army
| Great Northern Army | |
|---|---|
| Active | 1806-1822 |
| Country | File:Flag of the United States (1820-1822).svg United States |
| Branch | |
| Type | Field army |
| Nickname(s) | "Heroes of Canada" |
| Engagements | Canadian War |
The Great Northern Army, also known as Horatio's Heroes, was a major United States Army field army during the Canadian War.