[SevenMinusOne]

After WWII we disbanded the Wehrmacht and the Japanese Armed Forces.

Years later we started out fresh with new armed forces in both countries.

Correct - But WWII was a completely different war and an absolute different situation when looking at the actual conditions on the ground. And what our objectives were from the very beginning. (see my post #11 & #20).

[Cheburashka]

You have to build the new government, then the armed forces.

If the old armed forces stay in place, they believe they are more legitimate than the new government, and will never obey it wholeheartedly.
They will always look to restore the former regime.