During the age of New Imperialism, which nations were the conquerors or colonizers?

because the vietnam war was fought in an especially brutal and untraditional way

copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.