"The Slippery Memory of Men": The Place of Pomerania in the Medieval Kingdom of Poland (East Central and Eastern Europe in the Middle Ages, 450–1450), by Paul Milliman. Brill: Leiden, 2013, page 2 – "There is a huge literature on this topic in Polish and German, which was until recently lumped together with a whole host of other topics (including the peaceful settlement in East Central Europe of Germans and other western Europeans, who had been invited by Slavic lords) as the Drang nach Osten. Because of this term's associations with nineteenth-century nationalism and twentieth-century Nazism, it has for the most part been scrapped, only to be replaced by the deceptively benign 'Ostsiedlung' or the even more problematical 'Ostkolonisation[...]' [...]."
The Holocaust as Colonial Genocide: Hitler's 'Indian Wars' in the 'Wild East' – page 38; Carroll P. Kakel III – 2013: "Within National Socialist discourse, the Nazis purposefully and skillfully presented their eastern colonization project as a 'continuation of medieval Ostkolonisation [eastern colonization], celebrated in the language of continuity, legacy, and colonial grandeur".