Well, European countries didn't exactly solved all the problems they had when WW1 ended. The only reason why WW1 ended was because Europe got tired of fighting and wanted to clean up the aftermath of war. And Germany was also in devastation after WW1 and Hitler blamed all of this to the Jews which led to WW2.
The news of the failure of the French armies in Belgium gave rise in Paris to popular movements on March 9–10, 1793; and on March 10, on the proposal of Georges Danton<span>, the Convention decreed that there should be established in Paris an extraordinary criminal tribunal, which received the official name of the Revolutionary Tribunal by a decree of Oct. 29, 1793.</span>
Hello there,
They were motivated to to defeat more land's as possible. That's what the Incan law's motivated Huayna Capac to do.
Hope this helps.
~Jurgen