Der Halpbblutling means "half-breed". “Bastard.” This is how in the Third Reich of the alternative world, where the troops of Field Marshal Paulus won the Battle of Stalingrad, they call inferior children with Aryan appearance, born in non-Aryan lands. From them you can train soldiers for the Fuhrer's army. They will fight the barbarians in Siberia, Africa and America for the right to become a real German, an Aryan, a citizen of Greater Germany. But they will forever remain untermensch.