Why doesn't Canada fear any other country?

Allan: 

Look at Canada’s borders: Atlantic Ocean, Arctic Ocean, Pacific Ocean and the United States. 

The three oceans can’t be crossed with an invading force of sufficient size and logistics train to occupy any part of Canada. 

As for the US, the government of Canada invests a lot of effort to make sure that they get enough trade and moral support to leave us alone. (Sort of like humouring your cousin!)

Gareth Jones