The difference between aid, a treaty, and an alliance is that they have different meanings even though they were all used in WW1. Aid means that you help or assist. So if you have aid with a country you help them. Being an alliance with a country means that if someone does something to them you will go after whoever did something to them. It can be compared like your friends or family. A treaty is almost like an alliance but it's still different. A treaty is an agreement between countries. It is like attempting to become allies or attempt to stop war.
The U.S isn't part of the diagram because they got involved until 1917. So yes eventually they go involved. The reason for getting involved is that president Woodrow Wilson and congress declared war on Germany. Later they declared war on Germany ally Austria-Hungary. And that's how the U.S got involved in WW1.
The U.S isn't part of the diagram because they got involved until 1917. So yes eventually they go involved. The reason for getting involved is that president Woodrow Wilson and congress declared war on Germany. Later they declared war on Germany ally Austria-Hungary. And that's how the U.S got involved in WW1.