[4] In March 1943 Stanisław Basaj's unit liquidated the Ukrainian Post in Łasków, as well as in the villages in Szychowice, Kryłów and Mircze.

[6] In the evening of 7 March 1944, in the forest Lipowiec near Tyszowiec, a concentration of the Tomaszów AK troops took place, in the strength of about 1200 soldiers, under the command of Lieutenant Zenon Jachymek "Wiktor".

A pre-emptive attack on 9-10 March was planned by Hrubieszów District commander Marian Gołębiewski, the Home Army and the Peasant Battalions planned to capture Sahryń, Uhrynow, Szychowice and Łaskow on the aforementioned days.

[9] as a result of the attack on Szychowice the village was captured,[1] and the local Ukrainian population was killed.

Basaj's unit only lost 1 man and 2 were wounded,[12] however the capture of both villages resulted in the killing of Ukrainian civilians.

[10] Among the killed Ukrainians was Orthodox priest Lev Korobchuk [pl; uk].

[16] In retaliation, the Organisation of Ukrainian Nationalists-Ukrainian Insurgent Army (OUN-UPA) stepped up the anti-Polish action ongoing in the region, pacifying dozens of Polish villages.