A confederation founded in this nation's fortress of Bar resisted eastern encroachment.
A confederation founded in this nation's fortress of Bar resisted eastern encroachment. This nation, first established under the Piast dynasty, once had a three-house parliament that allowed any member to veto a bill, the Sejm. The thirteenth of Wilson's Fourteen Points demanded this nation's free access to a northern seaport. This country's Union of Lublin phase was ended by three partitions, and a union leader who organized a strike in its shipyards, Lech Walesa, became its first post-Communist President. For 10 points, identify this nation, the location of Solidarity, Auschwitz, and the Warsaw Ghetto.
A confederation founded in this nation's fortress of Bar resisted eastern encroachment.
 Poland