The May Coup ( or ) was a coup d'état carried out Action in Poland by Marshal Józef Piłsudski between 12 and 14 May 1926 .

Józef Bem .

The Polish were led by Józef Zajączek , the Russo-Prussian forces Military_operation by Petrowicz Zagriażski and Wilhelm Derfelden .

Following the Battle Hostile_encounter of Raszyn on April 19 , the Polish forces commanded Control by Prince Józef Poniatowski left Warsaw undefended and withdrew Escaping to several fortresses located nearby ( most notably to Modlin Fortress and Serock ) .

In both , the Polish forces retreated Escaping before the numerically superior Russian forces , though they offered Giving significantly more resistance in the south , thanks to the effective leadership of Polish commanders Prince Józef Poniatowski and Tadeusz Kościuszko .

The Polish coup Change_of_leadership d'état attempt in Lithuania refers to a failed attempt by Polish statesman Józef Piłsudski to overthrow Change_of_leadership the existing Lithuanian government of Prime Minister Mykolas Sleževičius , and install Change_of_leadership a pro-Polish cabinet that would agree Agree_or_refuse_to_act to a union with Poland .

Poland 's Chief of State , Józef Piłsudski , felt Coming_to_believe the time was right to expand Expansion Polish borders as far east as feasible , to be followed by a Polish-led `` Intermarium '' federation of Central and Eastern European states , as a bulwark against the re-emergence of German and Russian imperialism .

On 4–5 January 1919 , right-wing National Democrats attempted Hold to overthrow Change_of_leadership the government of Jędrzej Moraczewski and Józef Piłsudski .