Answer:
Under the Articles, states had more autonomy, while the Constitution gave some powers to the states. ... Under the Articles, states made more decisions about the economy than the national government.
To make money, control trade, raw materials and cheap labor, explore unknown areas, more scientific research, go on an adventure, gain power, compete with territory, good military force, prestige. Spread European values, Spread Christianity, protect European missionaries.
There really isn't anything positive for a war at all just mostly negative and the bad things are the following: Lost so many innocent lives, soldiers lost their lives from wars and in camps and prisons, so much money that could've been used for better purposes was wasted on some war, and countries went from allies to enemies even to this day.