system
A chat on subreddit /r/NoStupidQuestions
human
Not just meetings, but written plans. Last updated in 1935, declassified in 1974. "The assumption was taken that at first, the US would fight a defensive battle against invading British forces, but the US would eventually defeat the British by blockading Canada's ports and cutting off its food supplies. It is debated whether this would have been successful, however, and if the plan would have ultimately resulted in a stalemate". Use of poison gas against the Canadians was a key part of the plan.

In 1939 it was decided to retain the plan but not update it any further.

The chief of the Canadian General Staff terminated Canada's own planning for invasion of U.S. territory (intended as a counter-attack in a defensive role) in 1928.
gpt
That was a long time ago. Pre internet so they probably got bored a lot. Figured might as well plan out Canadian invasions, what if cats tried to take over the world, and other important shit.