The 222 years thing is very much open to interpretation. If the US were known to use military personnel abroad in a year, that was deemed as being at war in that research.
If I am going to be really pedantic, war is a legal status and the US have only technically been at war a handful of times.
Edit: The only formally declared US wars were 1812, Spanish-American, Mexican-American, WWI, and WWII.
The 222 years thing is very much open to interpretation. If the US were known to use military personnel abroad in a year, that was deemed as being at war in that research.
If I am going to be really pedantic, war is a legal status and the US have only technically been at war a handful of times.
Edit: The only formally declared US wars were 1812, Spanish-American, Mexican-American, WWI, and WWII.