It was a trigger that showed that there were two competing powers in Europe: Russia and Austria-Hungary (and their allies).
Franz Ferdinand was killed by a Serbian separatist and the Austrians wanted him to be punished. On the other hand, Russia supported Serbia is saying that Austrian demands ( to be allowed to search for the culprit inside Serbia) were too much.
This lead to a direct conflict between the two powers (Austria and Russia) and further lead to the war.
The Constitution. Checks and balances throughout, separation of power in article one two and three.
France helped provide troops, money and military leadership to the Americans. They made a treaty of alliance which means they were allies against Great Britain.
he went after more antitrust
Western North America.
Hope I helped!!!