American Revolution: Mixed
Quasi-War: Lean Justified
Barbary Wars: Justified
War of 1812: Completely Unjustified and Idiotic
Indian Wars: Completely Unjustified
Mexican-American War: Completely Unjustified
Civil War: Completely Justified
Spanish-American War: Unjustified
Philippine-American War and other acts of Indigenous suppression: Completely Unjustified
World War I: Lean Unjustified
World War II: Completely UnJustified for them not to aide in starting a two front war earlier
Korean War: completely Unjustified
Bay of Pigs Invasion: Completely Unjustified
Vietnam War: Completely Unjustified
Gulf War: Mixed
Kosovo War: Meh
Afghanistan War: UnJustified
Iraq War: Unjustified
Libyan War: Unjustified
War on ISIS: You can’t really count this when it was just a continuation from the Iraq Invasion
Lol at Korean War being completely unjustified when it was clearly started by the North Koreans and they were attacking our ally . The Afghanistan Government(The Tailban) also literally aided and abetted the terrorists who attacked us on 9/11 so the fact is they were complicit in attacking our nation so that makes the invasion completely justified , the occupation after the war you could argue as unjustified too.
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Only due to the South being controlled by the US-backed Korea, ran by previous servants of the Empire of Japan.
I am rating Afghanistan from the entire war, and the rationale to stay expired fairly quickly.