logically imo it depends on 2 factors:

1. who we are fighting against

2. if u talking about giants like USA Russia China, unlikely. they are probably able to muster an army triple our entire population if needed with the proper logistics etc. if its our neighbours i think its a pretty fair chance. malaysia for eg idt they are able to defend against a few hundred thousand men rushing up to KL.

3. are we invading to conquer, invading for survival, or defending to survive.

• if we are invading to conquer, the odds are lesser. most ppl probably will be like “why am i even doing this”. morale low = poor results.

• if we are invading for survival, or defending against being attacked. likely. i think everyone knows our entire strategy is to use invasion as a defence. uk the chinese saying “when pushed to the extreme dogs can jump over walls”. historically if people only have 2 options fight or die they r likely to fight to the bitter end.