tryin to help a friend write a paper and we had a few questionswhy did us invade? whats the truthful reason?

once inside marines were used for government control, oppressive racially divided periods backed by us, hypocritical actions, helping to recreate racial divides. etc etc, we can tell their motives were immoral fter the fact, but what was the real reason before?

articles from back then give differet reasons

sorry this is kinda incoherent, any help is appreciated!

why did us take gold and silver to new york a bit before invasion?