USA defeat in Vietnam War

To be fair the Vietnamese got their asses whopped in just about every battle of the War with the United States, there victory came in 1975, 3 years after the war with America ended.

The Americans couldn't find their ways around the dense jungle and kept dying every day, and finally ended up leaving. Most of the Vietnamese citizens wanted the war to be over no matter which side won, and many South Vietnamese just wanted the USA to leave, which would make the war end much sooner.

USA LATER: imma get the hell outta here

Meanwhile Canada who never lost a small single war

Mostly because they were part of the UK until not so long ago. And after that, they still were very close to them, so the UK helped them not lose any wars so far.