What factors prompt the united states to join the war for the allies

We must be talking about ww1 right? okay if so then let me be the first to offer my knowledge, we the people of america had joined the us war because of the sinking of the lusitania, there was precious cargo aboard and many americans and we at the time was trying to remain “ neutral “ but now that germans we’re sinking our ships , then the u.s could not let this withstand. the united states was also being robbed as well , while trying to preserve our weapons in case war did break out. and so it did. woodrow wilson’s 14 points , provokes peace for america but also all the frontiers , we also joined the war to our allies out. i hoped i answered your question