had no effective control of the area west of a line Mitrovica-Šabac-Valjevo-Užice. Reinforcements arrive On 14 September, List's request for reinforcement was finally agreed by OKH. The 342nd Infantry Division was ordered to deploy from occupation duties in France, and I Battalion of the 202nd Panzer Regiment of the 100th Panzer Brigade, equipped with captured French SOMUA S35 and Hotchkiss H35 tanks, was also transferred to Bader's command. Mačva operation The 342nd Infantry Division commenced its first major operation in late September in the Mačva region west of Šabac between the Drina and Sava. The targeted area was approximately in size. The first phase of the operation was the clearance of Šabac from 24–27 September, for which the division was reinforced by II/750th Infantry Regiment of the 718th Infantry Division, and by a company of the 64th Reserve Police Battalion. The second phase involved clearing of the wider area from 28 September – 9 October, supported by air reconnaissance, with limited dive-bomber support also available. Mount Cer operation The Mačva operation was followed immediately by an operation aimed at clearing the insurgents from the Mount Cer area. From 10–15 October, the 342nd Infantry Division conducted a more targeted operation around Mount Cer, where the insurgents targeted in the Mačva operation had withdrawn. During this operation, the division was further reinforced with most of the captured French tanks of I/202nd Panzer Regiment. Jadar operation After a few days break, on 19 and 20 October the 342nd Infantry Division conducted its third major operation, aimed at clearing the Jadar region and the main centre of insurgent activity in that area, Krupanj. It retained the support of two Panzer companies, and had fire support available from Hungarian patrol boats from their Danube Flotilla. Conflicts with the resistance By late 1941, with each attack by Chetniks and Partisans, brought more reprisal massacres being committed by the German armed forces against Serbs. The largest Chetnik opposition group led by Mihailović decided that it was in the best interests of Serbs to temporarily shut down operations against the Germans until decisively beating the German armed forces looked possible. Mihailović justified this by saying "When it is all over and, with God's help, I was preserved to continue the struggle, I resolved that I would never again bring such misery on the country unless it could result in total liberation". Mihailović then reluctantly decided to allow some