I'd say none except for the Revolutionary War.
But I'll explain my position on the five main ones:
War of 1812:
The British had announced an end to their blockade 2 days before Madison had his Congress declare War.
It was to gain control of the 14th Colony (if ever there was one), Canada.
It was unnecessary to expand overseas in the first place.
Mex-Am War:
Someone was killed in the area in which was disputed territory and James K Polk used that to get Congress to declare war, by claiming that the unmarked territory was the U.S.'s.
Span-Am War:
Popular support came from a false-flag attack. The U.S. planted a self-detonating mine in the Maine.
WWI:
The U.S. didn't need to be on the high seas.
Wilson gained support by sending ammo to Britain on the Lusitania, so that Germany would attack and that he'd have excuse to go to war. He was told by a military official to warn the people to get off the ship, as he had plenty of time, but he refused to warn them that they were about to blown up.
WWII:
FDR and an advisor had an 8 point plan to trick the Japanese into firing the first shot.
The U.S. had no business conquesting HI and occupying Pearl Harbor
But I'll explain my position on the five main ones:
War of 1812:
The British had announced an end to their blockade 2 days before Madison had his Congress declare War.
It was to gain control of the 14th Colony (if ever there was one), Canada.
It was unnecessary to expand overseas in the first place.
Mex-Am War:
Someone was killed in the area in which was disputed territory and James K Polk used that to get Congress to declare war, by claiming that the unmarked territory was the U.S.'s.
Span-Am War:
Popular support came from a false-flag attack. The U.S. planted a self-detonating mine in the Maine.
WWI:
The U.S. didn't need to be on the high seas.
Wilson gained support by sending ammo to Britain on the Lusitania, so that Germany would attack and that he'd have excuse to go to war. He was told by a military official to warn the people to get off the ship, as he had plenty of time, but he refused to warn them that they were about to blown up.
WWII:
FDR and an advisor had an 8 point plan to trick the Japanese into firing the first shot.
The U.S. had no business conquesting HI and occupying Pearl Harbor