It is quite easier to accept that Canada hasn't lost a war, or is it? While its militia played a small role in the War of 1812 against the United States, which ended in a draw, Canada didn't actually send its military overseas in a fully-fledged conflict until 1899 during the Second Anglo-Boer War.
Has any country never lost war?
War has affected every country across the globe, but only two countries remain undefeated in war. Those two countries are Canada and Australia, but how did these two countries manage to avoid a loss during heavy combat?
Which country has no army?
Andorra has no standing army but has signed treaties with Spain and France for its protection. Its small volunteer army is purely ceremonial in function.