The British were the Western Imperialists you're looking for.
Old imperialism was about trade, countries just wanted to trade with other countries, so there would be trading posts everywhere around the world. new imperialism was more about the money, they went into countries setting up factories and plantations. People went into war because they wanted power.
social Darwinism spread cultural values - racism/cultural superiority; white man's superiority
The Townshed acts were passed to raise money for Great Britain's debts, occurred in the french and indian war. I hope this helps!
I think it is the military government.
