Explanation:
On February 5, 1885, Belgian King Leopold II established the Congo Free State by brutally seizing the African landmass as his personal possession. ... The people of the Congo were forced to labor for valued resources, including rubber and ivory, to personally enrich Leopold.
The president that led the United States as it expanded into California, New Mexico, Arizona, Texas ,and Nevada is
<h2>
James K. Polk</h2>
Four empires collapsed: the Russian Empire in 1917, the German and the Austro-Hungarian in 1918
According to Albert Barnes, their mistake was that they didn't speak against slavery. Although many of them believed that slavery was against god and against the idea that god made everyone equal, they didn't do much against it out of many reasons, either they thought it was a necessary evil or they were afraid of the public reaction.