[3] By the time of the invasion, the Częstochowa region had 19 reinforced concrete combat and observation bunkers, plus 4 in Lubliniec as well as wooden and earth bunkers and mine fields, barriers, barbed wire, anti-tank ditches, trenches, artillery, anti-tank guns (Pistolet przeciwpancernymi Wz 36/bofors 37mm) and machine guns (Ckm wz.

[3] That evening at Gnaszyn position, in the main defenses near Częstochową, an ambush was conducted by soldiers of the 25th infantry regiment who launched a surprise attack on a staff car alongside a motorcycle.

[3] This ambush yielded maps and a captured Oberstleutnant (lieutenant colonel or commissioned officer) who was sent to a field hospital.

[3] The Poles lost one aircraft and its crew (PZL.23 Karaś), during an air raid on a German column on the Truskolasy-Węczyca Wielka road.

[3] In the late afternoon, a massive attack by German tanks and infantry was carried out on the defensive positions near Kiedrzyn, Lisiniec, Błeszne and Wrzosowa.

[3] In the area of Błeszno and Wrzosowa, some units of the 74th infantry regiment were forced back but after a counterattack, they retook their original positions from the Germans who suffered many casualties.

[4] Its commander General Janusz Gąsiorowski, was taken prisoner and staff documents, including the codes of the Polish Army, fell into German hands.

[3] German casualties amounted to over 250 killed, wounded and captured, while Polish losses are difficult to estimate, but smaller.