sent Lieutenant Neško Nedić to meet with a representative of Aćimović's to ensure he was aware that Mihailović's forces had nothing to do with the "communist terror". The Germans then encouraged Aćimović to make an arrangement with Mihailović, but Mihailović refused. Nevertheless, neither the Germans nor Aćimović took effective action against Mihailović during the summer. On 17 July, Einsatzgruppe Serbien personnel were distributed among the four area commands as "security advisors". The following day, Generalmajor Adalbert Lontschar, commander of the 704th Infantry Division's 724th Infantry Regiment was travelling from Valjevo when his staff car was fired on near the village of Razna, wounding one occupant. In response, the district command executed 52 Jews, communists and others, with the assistance of the Serbian gendarmerie and Einsatzgruppe Serbia. Also in July, the German military government ordered the Jewish community representatives to supply 40 hostages each week who would be executed as reprisals for attacks on the Wehrmacht and German police. Subsequently, when reprisal killings of hostages were announced, most referred to the killing of "communists and Jews". In late July, Schröder died after being injured in an aircraft accident. When the new German Military Commander in Serbia, Luftwaffe General der Flieger Heinrich Danckelmann, was unable to obtain more German troops or police to suppress the revolt, he had to consider every option available. As Danckelmann had been told to utilise available forces as ruthlessly as possible, Turner suggested that Danckelmann strengthen the Aćimović administration so that it might subdue the rebellion itself. The Germans considered the Aćimović administration incompetent and by mid-July were already discussing replacing Aćimović. On 29 July, in reprisal for an arson attack on German transport in Belgrade by a 16-year-old Jewish boy, Einsatzgruppe Serbien executed 100 Jews and 22 communists. By August, around 100,000 Serbs had crossed into the occupied territory from the NDH, fleeing persecution by the Ustaše. They were joined by more than 37,000 refugees from Hungarian-occupied Bačka and Baranja, and 20,000 from Bulgarian-annexed Macedonia. At the end of July, two battalions of the 721st Regiment of the 704th Infantry Division were sent to suppress rebels in the Banat region, who had destroyed large wheat stores in the Petrovgrad district. Such interventions were not successful, as the occupation divisions lacked the mobility and training for counter-insurgency. On 4 August, Danckelmann requested that the OKW reinforce his administration with two additional police battalions and another 200 SD