Why do you think some European nations gave up their colonies without a fight, while others fought for their colonies? (just a few sentences) (thank you if you help)

its a questionable proposition to say they “gave them up.” In a,sense they did, but in a more devious manner they did not. Lets use Sub-Saharan Africa as an example. The British, French, Portuguese, and Belgians had that region in a,strangle hold. Due to post WW2 agitation on the part of Black colonials that saw the true hypocrisy in fighting the Nazis for European liberation from Hitler, but having it denied to them at home, many returning African troops, as well as political agitators in the colonial capitals of London, Paris, Lisbon, and Brussels demanded self-governing rights. So as to quiet them down, the European powers granted them their “Freedom.” So, what did the freedom consist of? Let's look at the old “Belgian Congo.”

the answer should be monarchy

4 copper and gold, the california gold rush is why im pretty sure.