Yes, there were five states that joined the Union in war, but I do not think they were ten years apart.
Answer:
The most important goal was the establishment of the nation series. We hope that there will be no other major conflict. One of his goals was to end World War One, and he attempted to achieve this by creating 14 points. Global peace was essential to him, and this was the bulk of his efforts during his presidency.
There was discontent [dissatisfaction] in Russia because the government was corrupt and ineffective, there was widespread poverty in the country, there was a scarcity of food, and the Russians suffered massive losses in World War I.
The Mexican American War heightened tensions over slavery in that there were many disagreements over whether the new territories won from Mexico should be free or slave territories. The Wilmot Proviso, created to solve the problem, ended up slitting parties on regional areas.
Good luck :)