Many. For example, French revolution and the wars after it until thermidorian reaction. Or February revolution and after that went to shit, October one and the ensuing civil war. Haitan revolution. Peasant War in Germany. Xinhai revolution, then war against Japanese then civil war. Greek Independence war. Many irish or polish uprisings. Vietnam War. Etc etc. It don't even have to be 100% ideologically pure (it never is btw). Hell even the aggressive war can be just like Vietnam invasion on Cambodia.

are more about which particular group gets to do the oppressing.

State by its very nature is machine used by ruling class to opress others. Yet not every opression is equal. Again, if you expect total ideological purity manifested in flesh, you will get disappointed every time.