Yes, the American First Committee; which included members of the US Congress. http://en.wikipedia.org/wiki/America_First_Committee But, as soon as the Japanese attacked American, American First Committee members voted for war.
The two primary groups opposed to the Mexican-American War were abolitionists and some Whigs. Abolitionists opposed the war because they feared it would expand slave territory and perpetuate slavery in new states. Meanwhile, many Whigs criticized the war on moral and constitutional grounds, arguing it was an unjust aggression against Mexico and a distraction from domestic issues.
because many american were against the vietnam war so there was 2 groups.
american and british
Most likely the attacks by Germany (in either world war) against American civilians and American shipping in the Atlantic Ocean.
To bring up war support and gain the American people to be for it not against it.
the allies.aka usa russia France and the UK
In many historical contexts, groups on the same side in a war often include allied nations or factions united by common interests or threats. For instance, during World War II, the Allies, including the United States, the Soviet Union, and the United Kingdom, fought against the Axis powers. In the American Civil War, the Union and its supporters were on the same side against the Confederacy. The specific groups can vary widely depending on the conflict in question.
As in all civil wars, the US Civil War pitted two American groups against one another: in this case, the North or Union against the South or Confederacy.
There were no terrorist groups in World War I.
White people.
Women and African-Americans
Indian Wars (against the natives) American Revolution (We just helped out) French Revolution (We just helped out) U.S. Civil War (against ourselves) Mexican-American War Spanish-American War World War I (again, we just helped out) World War II (We just helped out) Korean War (draw) Gulf Wars