Actually, you are wrong about the helmet. Most countries do NOT use that shape any more.
You're also wrong about the first guided missile. They DID deploy the first ballistic missile (not the same thing) but it was a failure: more people died making them than were killed by them when they were targeted.
And, of course, you left out the most important invention of WWII, which was radar. The Germans were always behind the curve on that, and never developed a working microwave radar during the war.
And you left out the second-most important weapon of WWII, the atom bomb.
I'll try not to laugh too loud about the camouflage claim.