The war of 1812.
The Civil War was not between Canada and America. It was between the northern and southern US states.
The War of 1812
They were allies
war of 1812
Canada and the US were at war only during the War of 1812. The US was actually at war with the British Empire, but Canada was the closest part of that Empire. Since then Canada and the US have gotten along quite well.
The Pig War.
The US sent men there in '55 and pulled the last man out in '75.
No, the U.S. did not conquer Canada in the War of 1812.
The War of 1812 when the US attacked Canada!
The cold war was good between the united states and Canada. It got them working together and the two countries became friends. Canada was mostly helping the US and not the USSR. That is why they became closer after the cold war and started helping each other out more.
Possible the two times we tried to conquer Canada. One in the Revolutionary war and one in the War of 1812. Then there was the bootleg liquor that was freely crossing the border during Prohibition in the US. Water and land issues (54 40 or fight) And recent political dust ups when Canada did not support us in some war or another.
The last US declared war was WWII.