Editing Ostrołęka (section)

===Interbellum===
[[File:Ostroleka-glowackiego miedzywojnie.jpg|thumb|Ostrołęka in the [[interbellum]]]]
After the First World War and re-establishment of independent Poland in 1918, the city became a part of the [[Białystok Voivodeship (1919–1939)|Białystok Voivodeship]]. 75% of the city and population was devastated. New schools and departments were opened as the city was rebuilt.

During the [[Polish-Soviet War]], Ostrołęka once again became a center for military operations. On 4 August 1920, Soviet forces under the command of [[Hayk Bzhishkyan]] took the fort and "butchered the newly assembled cavalry group" of General [[Bolesław Roja]].<ref name=Davies>Davies, N., 1972, White Eagle, Red Star, London: Macdonald & Co, {{ISBN|978-0-7126-0694-3}}</ref>{{rp|150}} Local Jewish communists organized a rally in the city, tore Polish emblems and flags from buildings, and the newly appointed revolutionary committee leader, member of [[Poale Zion]], announced to local wealthy Poles and Jews that their property will be taken from them.<ref>{{cite journal|last=Szczepański|first=Janusz|year=2020|title=Okupacja sowiecka Mazowsza Północnego podczas najazdu 1920 r.|journal=Niepodległość i Pamięć|language=pl|publisher=[[Museum of Independence|Muzeum Niepodległości w Warszawie]]|volume=XXVII|issue=2 (70)|pages=18, 26|issn=1427-1443}}</ref> The local Polish [[intelligentsia]] and prominent religious Jews, along with the rabbi, were subjected to forced labour in the city.<ref>Szczepański, p. 19</ref> However, the Soviet occupation was short lived as the Soviet XV Army retreated on 20 August, with Polish forces thundering east towards the former Polish-Soviet border after the [[Battle of Warsaw (1920)]].<ref name=Davies/>{{rp|205}}

After the Polish-Soviet War, Ostrołęka began to industrialize. A cinema was opened in 1923, and a power plant in 1928. During the summer of 1939, both sides of the Narew beachhead were fortified.