Two major forms were indentured servitude and full slavery. In slavery, people were slaves and had to work forever or until they get sold or freed. In indentured servitude, people would work until their debts were paid, commonly these debts being there because they wanted to get to the new world.
The Western Front was a military theatre of World War II encompassing Denmark, Norway, Luxembourg, Belgium, the Netherlands, the United Kingdom, France, Italy, and Germany. World War II military engagements in Southern Europe and elsewhere are generally considered under separate headings.
