Timeline of Polish History - 20th Century

20th Century

Year	Date	Event
1908	September	Bezdany raid
1916	5 November	Signing of the Act of November 5th
1917	9 July	Oath crisis
1918	3 March	Signing of the Treaty of Brest-Litovsk
	11 November	Poland regains independence
	27 December	Greater Poland Uprising begins
1919		Proclamation to the inhabitants of the former Grand Duchy of Lithuania
		Sejny Uprising
	26 January	Legislative election
	14 February	Polish–Soviet War begins
	16 February	Greater Poland Uprising ends
	20 February	Adoption of Small Constitution
	16 August	First Silesian Uprising begins
1920		Signing of Treaty of Warsaw
		Żeligowski's Mutiny
	10 February	Poland's Wedding to the Sea in Puck
	July	Spa Conference
	19 August	Second Silesian Uprising begins
1921	19 February	Signing of the Franco-Polish alliance
	17 March	Adoption of Mar Constitution
	18 March	Signing of the Peace of Riga concludes the Polish-Soviet War
	20 March	Upper Silesia plebiscite
	2 May	Third Silesian Uprising begins
1922	November	Legislative election
	9 December	Gabriel Narutowicz becomes President
	16 December	Assassination of Gabriel Narutowicz
	22 December	Stanisław Wojciechowski becomes President
1925	1 December	Signing of the Locarno Treaties
1926	May	May Coup
1926	4 June	Ignacy Mościcki becomes President
1928		Legislative election
1930	16 November	Legislative election
1932	25 July	Signing of the Soviet–Polish Non-Aggression Pact
1934	26 January	Signing of the German–Polish Non-Aggression Pact
1935		Legislative election
	23 April	Adoption of Apr Constitution
	12 May	Death of Józef Piłsudski
1938		Legislative election
	1 April	Territorial changes of Polish Voivodeships
	October	Annexation of Zaolzie
1939	23 August	Signing of the Molotov-Ribbentrop Pact
	25 August	Signing of the Polish-British Common Defence Pact
	29 August	Peking Plan begins
	31 August	Gleiwitz incident begins
	1 September	Invasion of Poland begins; Bombing of Wieluń
	2 September	massacre on Torzeniec village
	3 September	Bloody Sunday
	9 September	German Massacre in Ciepielów on polish POW
	13 September	Bombing of Frampol
	17 September	Soviet invasion of Poland
	18 September	Orzeł incident
	6 November	Sonderaktion Krakau
1940	5 March	Authorization of Katyń massacre
1940	16 May	Authorization of AB Action
1941	July	Massacre of Lwów professors
	10 July	Jedwabne pogrom
	17 August	Signing of the Sikorski–Mayski agreement
1943	26 March	Operation Arsenal
	19 April	Warsaw Ghetto Uprising begins
	16 May	Warsaw Ghetto Uprising ends
	4 July	Death of Władysław Sikorski
	11 July	Beginning of Massacres of Poles in Volhynia
	1 December	Tehran Conference concludes
1944		Glinciszki massacre
	29 January	Koniuchy massacre
	28 February	Huta Pieniacka massacre
	22 July	Proclamation of the PKWN Manifesto
	25 July	Operation Most III begins
	August	Wola massacre
	1 August	Warsaw Uprising begins
	2 October	Warsaw Uprising ends
1945	27 January	Przyszowice massacre
	11 February	Yalta Conference concludes
	March	Pawłokoma massacre
	17 March	Poland's Wedding to the Sea in Mrzeżyno
	18 March	Poland's Wedding to the Sea in Kołobrzeg
	June	Augustów chase 1945; Trial of the Sixteen
	2 August	Potsdam Conference concludes
	11 August	Kraków pogrom
1946	30 June	People's referendum
1946	4 July	Kielce pogrom
1947	19 January	Legislative election
	19 February	Adoption of Small Constitution of 1947
	28 April	Operation Vistula begins
1950	6 July	Signing of the Treaty of Zgorzelec
1951		Trial of the Generals
1952		Legislative election
1952	22 July	Adoption of Constitution of the People's Republic of Poland
1955	14 May	Signing of the Warsaw Pact
1956		Polish October
1956	28 June	Poznań 1956 protests begin
1957		Legislative election
1961		Legislative election
1965		Legislative election
1965		Letter of Reconciliation of the Polish Bishops to the German Bishops
1968	March	Political crisis
1968	20 August	End of Prague Spring with the invasion of Czechoslovakia
1970	7 December	Signing of Treaty of Warsaw; Warschauer Kniefall
1970	14 December	1970 protests begin
1978	16 October	Election of Pope John Paul II
1980		Gdańsk Agreement
	14 March	LOT Polish Airlines Flight 007
	17 August	21 demands of MKS
1981	13 December	Martial law begins
1983		Solidarity leader Lech Wałęsa receives the Nobel Peace Prize.
1983	22 July	Martial law ends
1984		Father Jerzy Popiełuszko murdered by Polish secret police.
1989	4 April	Signing of the Round Table Agreement
	7 April	April Novelization
	4 June	Parliamentary election
	19 July	Wojciech Jaruzelski becomes President
	31 December	The People's Republic of Poland becomes the Republic of Poland
1990		Presidential election
	27 May	Local elections
	14 November	Signing of German–Polish Border Treaty
	22 December	Lech Wałęsa becomes President
1991	27 June	Mława pogrom
	1 July	Dissolution of Warsaw Pact
	27 October	Parliamentary election
1992	17 October	Adoption of Small Constitution
1992	21 December	Signing of Central European Free Trade Agreement
1993	14 September	Lufthansa Flight 2904
1993	19 September	Parliamentary election
1994	2 May	Poland bus disaster of 1994
1994	19 June	Local elections
1995	November	Presidential election
1995	23 December	Aleksander Kwaśniewski becomes President
1997	2 April	Adoption of Constitution
1997	21 September	Parliamentary election
1998	11 October	Local elections
1999	12 March	Accession of Poland to NATO
2000	8 October	Presidential election