You believe your teacher when she says that we have 'the most
advanced weapons in the world'? Do you think we have nuclear ICBMs,
stealth bombers and aircraft carriers? Do you think we have the
ultimate capability to thrash any invading army with absolutely
zero casualties just because we have 'the most advanced weapons in
the world' (which we don't)?
Hogwash, I say. It'll be hell for any enemy to conquer us, but they
can really give us a bloody nose if they want to. I agree that we
can't depend on alliances, but it'll still be good to have them
anyway. Better have 10% chance of someone else helping us than 0%,
I say.
It's extremely narrow-minded to judge that alliances are useless
based merely on the experiences of WWI. Just over twenty years
later in WWII the Allied armies of France, UK, US and the others
rose to defeat Hitler. In 1999 the NATO alliance bombed Yugoslavia
in the Kosovo War.