They might be very common, but are not mentioned here yet: Many of Bob Marleys Songs can fit in this archive. There's also a compilation of his songs called "Songs of Freedom": https://en.wikipedia.org/wiki/Songs_of_Freedom
I picked one that deals with the liberation of the african continent, color of skin, and (as the title of the song) decolonial war:
https://www.youtube.com/watch?v=loFDn94oZJ0