The Hungary-USA War was the war between USA against Hungary . Republic of Macedonia (FYROM) and Slovenia .
After a war between, mainly, Republic of Macedonia (FYROM) and USA . last ones ended with some regions at Europe. USA attacked Austria for conquering it and having border with Hungary . This last country asked Austria to attack them, so Hungary wouldn’t receive US attack at its motherland. Austria also received the attack of Slovakia . but they liberated the regions later.
The problem for USA was having the support of their alliance, CTRL. specifically the support of Poland . Relationship between countries wasn’t the best and Poland had good relationship with Hungary . Poland didn’t sign again MPP with USA and stayed, via MPP, at Hungarian side.