2 bagillion years
In Europe, nearly six years, but the USA involvement was only three and two thirds years.
The Second Anglo-Powhatan War began in 1644 as a last effort by the Indians to dislodge the Virginian settlers and a last effort by the settlers to exterminate the Indians.
7 years
The war with Tripoli lasted five years
The war with Tripoli lasted five years
5 years
9 month
3 years.
9 month
6 years
1861 to 1865
About 6 years