Other than the war of the rebellion (Civil War) none. Texas & California were republics but neither fought the US. Arizona threatened to mobilize its Army National Guard and take on US troops over the water project in Arizona in the 1930s. Gov. Wallace did mobilize his Alabama Army National Guardsmen to enforce African-American (Blacks) segregation in his public schools. But the US president activated Wallace's Guardsmen turning them into US troops then reversed their orders.
The US Army fought more because there were more of them, but the US Marines also fought against the Germans in France.
Texas (then Republic of Texas).
In both countries, blacks were discriminated against and treated with contempt. Blacks did not have equal opportunities with the whites. In the US, blacks fought against racism while in SA they fought against apartheid.
The US Civil War was fought against itself (brother against brother). The country of Israel fought other countries, unrelated to them.
The Battle of the Bulge, fought against the Germans, in Belgium, during the winter of 1944-45.
Louisiana was once a republic that fought against the United States government.
They fought off the British and the state New England
Both Germany and Japan fought against the US in WW2.Both Germany and Japan fought against the US in WW2.
pfft, who hasn't the US army fought against!?!?
The Republic of Texas became a member of the United States December 29, 1845. It would later secede from the Union February 1,1861 and fight the Federal government as one of the Confederate States of America.
Us fought against Italy, Germany and Japan.
The US and the USSR never fought against each other.
The former Republic of Texas.
Iceland
The Korean war was fought against North Koreans and Russian servicemen.
The US Army fought more because there were more of them, but the US Marines also fought against the Germans in France.
no but they fought against Japan