Just before World War I ended, [Rada Regencyjna]? in [7 October]? 1918 published manifesto to [Polish nation]?, in which it announced its support for independence of Poland. With notable exception of SDKPiL?, most parties supported this move.
In [23 October]? Rada Regencyjna created new government under [Josef Swierzynski]? and started recruitment to Polish Army.
In [5 November]? in Lublin?, first [Soviet of Delegates]? was created.
In [6 November]? communists announced creation of [Republic of Tarnobrzeg]?. The same day [Temporary People's Government of Republic of Poland]? under [Ignacy Daszynski]? was created.
In [10 November]? Pilsudski?, freed from [Magdenburg prison]? returned to Warsaw. Because of is popularity and support from most political parties, Rada Regencyjna gave Pildudski Highest Command over Polish Army the next day. In [14 November]? Rada Regencyjna dissolved and transfered all its authority to Pilsudski.
In [10 November]? [Centralny Komitet Obywatelski]? created government under [Stanislaw Adamski]?.
Centers of government created in Galicja? were [National Council of Principality of Cieszyn]? (created [19 November]?), and [Polish Liquidation Comittee]? (created [28 October]?).
Very soon battle of Lvov? between Ukrainians ([Military Comittee of Ukrainians]?) and Polish ([Eagles of Lvov]?) started.
After consultation with Pilsudski, Daszynski's government dissolved and new government was created under [Andrzej Moraczewski]?.
...(some of details skipped)
Elections of Sejm - 26 January 1919
War against Soviets.
Uprisings in Wielkopolska and Silesia.
15 July 1920 - Agrarian Reform.
17 March 1921 - [March Constitution]?
Election to Sejm and Setnat - November 1922.
President Narutowicz, and assasitanion of him (16 December 1922)
Grabski Government.
President Wojciechowski - 20 December 1922 to [Zamach majowy]?
[Zamach majowy]?
and so on..., it needs turning into real article, more details and extending to next years
See also: History of Poland, [History of Poland -- World War I 1914-1918]?, History of Poland -- World War II 1939-1945