II./StG 2 fought in the Battle of Radom until 9 September but little of its further service in Poland is known. I. and III./StG 2 assisted in the destruction of the Prusy Army at Radom. Two "gruppen" moved south toward I./StG 2. I. and III./StG 2 fought in the Battle of the Bzura. III./StG 2 attacked road and troop concentrations in the Battle of Lwów. From 2–6 September I./StG 2 repeatedly attacked Piotrków Trybunalski rail station inflicting heavy casualties on detraining Polish infantry forces in the Battle of Piotrków Trybunalski. The 40 Ju 87s comprised elements of I./StG 2 and StG 76. Of the three "gruppen", III./StG 2 is known to have taken part in the siege of Warsaw. First "gruppe" fought in the Battle of Modlin as Polish resistance collapsed.