The 1918 Restoration Of Poland
Poland Is Back On The Map!
Late in 1918 a Polish government was formed and an independent Poland declared. A small uprising then occurred by Poles in the Province Of Posen (although technically German it was under Polish control at that point). This was the early seeds of a restored Poland.
At the end of World War 1 the Treaty of Versailles was signed on 28 June 1919. This was an agreement between multiple nations on how World War 1 would be brought to an end.
Germany Ordered To Hand Poland Back To The Poles
This treaty stripped Germany (formerly Prussia) of some of its lands and ordered it to return Polish land back into the hands of a Polish Government. At the same time Germany was awarded some of Russia's land. Ultimately, a vast area came to be known as "Poland" that shared a lot in common with the original boundaries of Poland.
I like plain English and I read the paragraph above as being a reversal of the first partition of Poland i.e power taken back off Austria, Germany and Russia and handed back to Poland.