An American benefits from a Union because Unions can help worker's rights be protected in the workplace and can communicate for the worker with the bosses, as well as represent the worker if they think there's unfair treatment.
Served as division commander in Battle of Antietam and Independent Command over Army of Tennessee
The Mother Country benefits from mercantilism. The Colonies serve the Mother Country by supplying raw materials to the Mother Country at a low price. The Mother Countries further controlled trade by only allowing their colony to trade with their mother country and laying tariffs on goods imported from other nations. According to mercantilism, a nation becomes wealthy by exporting more than it imports. Meanwhile, the Mother Country benefits from the resources and wealth.