Justified and Unjustified Wars

[Atlas Has Shrugged]

American Revolution - Completely Justified.
Barbary Wars - Justified.
War of 1812 - Justified.
All Indian Wars - Some were justified, some weren't.
Mexican American War - Justified.
Civil War - Justified as the South acted aggressively at Fort Sumter.
Spanish American War - Unjustified
Philippine American War - Unjustified.
World War I - None of our concern.
World War II (Pacific) - Completely Justified
World War II (Europe) - Justified as the German's randomly declared war on us.
Korean War - None of our concern.
Vietnam War - None of our concern.
Gulf War - None of our concern.
Afghanistan - Justified until we killed Bin Laden, unjustified since.
Iraq - Is this even a question?
ISIS - No further reason to get involved unless they attack the homeland.