Frederick the Great settled around 300,000 colonists in the eastern provinces of
Prussia and aimed at a removal of the Polish nobilty, which he treated with contempt and likened the 'slovenly Polish trash' in newly reconquered West Prussia to Iroquois.
[43] [44]. A second
colonization aimed at Germanisation was pursued by Prussia after 1832
[45]. Laws were passed in Prussia aimed at Germanisation of the provinces
of Posen and
West Prussia in the late 19th century, also 154,000 colonists, including locals, were settled by the
Prussian Settlement Commission in the provinces of Posen and West Prussia before World War I.
The American historian of German descent
[50] Richard Blanke in his book
Orphans of Versailles names several reasons for the exodus of the German population describes the process itself. The author has been criticised by Christian Raitz von Frentz and his book classified by him as part of a series on the subject that have an anti-Polish bias. Polish professor A. Cienciala notes that Blanke's views in the book are sympathetic to Germany
[51]
- A number of former settlers from the Prussian Settlement Commission who settled in the area after 1886 in order to Germanise it were in some cases given a month to leave, in other cases they were told to leave at once[48].
- Poland found itself under threat during the Polish-Bolshevik war[48], and the German population feared that Bolshevik forces would control Poland. Migration to Germany was a way to avoid conscription and participation in the war.
- State-employed Germans such as judges, prosecutors, teachers and officials left as Poland did not renew their employment contracts. German industrial workers also left due to fear of lower-wage competition. Many Germans became economically dependent on Prussian state aid as it fought the "Polish problem" in its provinces[48].
- Germans refused to accept living in a Polish state[48]. As Lewis Bernstein Namier claimed: "Some Germans undoubtedly left because they would not live under the dominion of a race which they had previously oppressed and despised."[52]
- Germans feared that the Poles would seek reprisals after over a century of harassment and discrimination by the Prussian and German state against the Polish population[48].
- Social and linguistic isolation: While the population was mixed, only Poles were required to be bilingual. The Germans usually didn't learn Polish. When Polish became the only official language in Polish-majority provinces, their situation became difficult. The Poles shunned Germans which contributed to their isolation[48].
- Lower standards of living. Poland was a much poorer country than Germany[48].
- Former Nazi politician and later opponent Hermann Rauschning wrote that 10% of Germans were unwilling to remain in Poland regardless of their treatment, and another 10% were workers from other parts of the German Empire with no roots in the region[48].
Blanke states that official encouragement by the Polish state played a secondary role in the exodus
[48]. Christian Raitz von Frentz notes "that many of the repressive measures were taken by local and regional Polish authorities in defiance of Acts of Parliament and government decrees, which more often than not conformed with the minorities treaty, the Geneva Convention and their interpretation by the League council - though it is also true that some of the central authorities tacitly tolerated local initiatives against the German population."
[42] While there were demonstrations and protests and occasional violence against Germans, they were at a local level, and officials were quick to point out that they were a backlash against former discrimination against Poles
[48]. There were other demonstrations when Germans showed disloyalty during the Polish-Bolshevik war
[48] as the Red Army announced the return to the prewar borders of 1914
[53]. Thus despite popular pressure and occasional local actions, perhaps as many as 80% of Germans emigrated voluntarily
[48].