Uderzeniowe Bataliony Kadrowe Uderzeniowe Bataliony Kadrowe ( " UBK " , English : " Striking Cadre Battalions " ) were armed anti - Nazi resistance units organized by the right - wing Polish organization Konfederacja Narodu . They existed between 1942 and 1944 ( after 1943 they were part of the Home Army ) . Beginnings . The idea to create the UBK was conceived among Warsaw ’ s conspirational circles in early 1940s . Altogether , eight battalions were formed , and their task was to engage the Germans in Polish countryside , especially in the Eastern Borderlands of Poland . First attempt to organize armed resistance took place in October 1942 . Members of the 1st Battalion , under Captain Ignacy Telechun ( nom de guerre " Toporski " ) , after concentration in the forests north of Warsaw , headed towards northern Podlasie , where they wanted to set a base . However , their forces were not strong enough and after several skirmishes with the Wehrmacht , the unit returned to Warsaw . They lost 36 men - 4 killed , 2 wounded and 30 captured . Campaigns . During winter of 1942 / 43 , the UBK carried out preparations for future actions . In January 1943 , a patrol under Ryszard Reiff ( " Jacek " ) set towards Ciechanowiec , where the 1st Striking Partisan Platoon was created . After some time , the Platoon was renamed into the 8th Battalion . In late May 1943 , UBK , with permission of the headquarters of the Home Army , concentrated its forces ( 200 men ) around Wyszkow . The Germans soon found out about it and surrounded the Poles . A skirmish ensued , in which 4 Poles were killed and 8 wounded . German losses were estimated at 15 killed and 22 wounded . Those who were not caught , divided themselves into two groups and headed north , to Bezirk Bialystok . On June 11 , 1943 , the UBK forces under Major Stanislaw Pieciul ( " Radecki " ) of the 4th Battalion engaged the Germans near the village of Pawly ( Bielsk Podlaski County ) . 25 Poles and approximately 40 Germans died . In July 1943 the UBK units , active in Bezirk Bialystok , consisted of five Battalions . Altogether , there were 200 fighters , and during a number of skirmishes with the Germans ( including the 1943 Polish underground raid on East Prussia ) , 138 of them were killed . These heavy losses were criticized by the headquarters of the Home Army , who claimed that the UBK was profusely using lives of young Polish soldiers . On August 17 , 1943 , upon the order of General Tadeusz Bor - Komorowski , the UBK was included into the Home Army . Soon afterwards , all battalions were transferred to the area of Nowogrodek . During process of reorganization of the Nowogrodek Area of the Home Army , the UBK units created a battalion , which became part of the 77th Infantry Regiment of the Home Army , under Boleslaw Piasecki . In February 1944 the battalion had around 700 soldiers ( some sources put the number at around 500 ) . The unit took part in the Operation Tempest , fighting the Germans around Lida and Wilno ( see : Wilno Uprising ) , where it suffered heavy losses . Dissolution . On July 17 , 1944 , the NKVD officers invited Wilno command of the Home Army for negotiations , arresting them immediately . After this , the former UBK dissolved , and those soldiers who came from Central Poland decided to get back to their homeland .