Chicken can not exactly eat a ham sandwhich
Spain's main goal was to take them over because A) they wanted it for themselves and B) they didn't want England to have it. Spain and England were not on good terms at the time. (I think.) There was a marriage gone wrong, depending on the time period we are talking about, and it left them on bad terms. Spain and England wanted to be more powerful than the other, as all countries do. At this time, you were either the conqueror or the conquered.
France's main goal was probably the same. They earned their trust and America as an ally. They decided to help the Americans during the Revolutionary War. I believe they did this so they could get a part of the great resources America had.
England believed America was theirs in the first place. They sent Columbus, even though he was Spanish, on the expedition to where he found America. Even though he was supposed to be going to India, he still found America. England sent the pilgrims and England also colonized America. Therefore, they felt they had the right for everything in the Americas.
I may be wrong, but that's the best I can do with my knowledge.
It showed that the Articles of Confederation made the federal government so weak that a group of farmers was able to overthrow it. This then caused the Constitutional Convention where the Constitution was first written.
