Well they noticed that the government was having so called "difficulties" so they took advantage
European Imperialism was a period of colonial expansion. It is the most important cause of WW1 because it built tension between the countries. It caused Tension between Nations and Countries. Was a cause of WW1 by separating from where they stand to form another empire away from their old empire, to avoid dictatorship.
Erik the Red. Erik the Red, byname of Erik Thorvaldsson, Old Norse Eirik Rauð, Icelandic Eiríkur Rauði, (flourished 10th century, Norway?), founder of the first European settlement on Greenland (c. 985) and the father of Leif Eriksson, one of the first Europeans to reach North America.
Hope this helps. :)
Because once an indentured servants time is up, you have to let them live their own life, but if you have a slave, you literally own them and keep them until they die if you choose to do so.