How did the death of archduke frank instigate the collapse of peace for europe?

It started ww1, the archduke was killed by a Serbian nationalist

Russia mobilized to help its Balkan allies. Germany, due to its pact with Austria-Hungary, was forced to mobilize to help their allies. Knowing that France had a pact with Russia, Germany attacked it, heading through Belgium. Britain, since it remained an ally of Belgium, and to a lesser extent France, declared war on Germany. And so the Great War began. 

Cherokee  removal, part of the trail of tears, refers to the  forced  relocation between 1836 and 1839 of thecherokee  nation from  their lands ingeorgia, south carolina, north carolina, tennessee, texas, and alabama to the indian territory (present day oklahoma)  in  the thenwestern united states, and the resultant deaths

The answer is william henry harrison pursued and defeated british forces retreating into canada.