7 June Das Reich was ordered to move to Normandy to reinforce the German units contesting the Allied invasion. An unopposed movement of men and equipment by railroad would have taken three or four days over approximately . However, the option to move by rail had been preempted by the Special Operations Executive (SOE). The rail cars to be used for transporting the tanks and equipment were unguarded. In the days before 6 June French operatives of the SOE's Pimento network, headed by Anthony Brooks, sabotaged the rail cars by draining the axle oil and replacing it with an abrasive powder that caused the axles of the cars to seize up. The powder had been parachuted in by SOE. The perpetrators of the sabotage were a 16-year-old girl named Tetty, her boyfriend, her 14-year-old sister, and several of their friends. As a consequence of the sabotage of the rail cars, Das Reich left Montauban on 8 June with 1,400 vehicles and proceeded northward by road. Travel by road caused the steel tracks of the tanks and assault guns to wear out; vehicles broke down frequently; and fuel was in short supply. Pinprick attacks by groups of resistors, called Maquis, killed 15 Germans on the first two days of the movement. More than 100 French were killed, many of them unarmed civilians. Das Reich was ordered to suppress the Maquis during its journey; "to break the spirit of the population by making examples." The division carried out the order by massacring hundreds of civilians on 9 and 10 June in Tulle and Oradour-sur-Glane.(see below) Attacks by resistance forces mostly ended on 12 June as Das Reich moved into less favorable territory for ambushes. Air attacks hindered the progress of the division in the last phases of its northward journey. On 11 June British bombers attacked and destroyed several railcars full of much-needed gasoline at Châtellerault. The air strike was directed by the Special Air Service (SAS) group called Operation Bulbasket. After its advance elements crossed the Loire River on 13 June, the division was under constant air attacks during the day. As a result, Das Reich arrived only piecemeal to the Normandy battlefield between 15 and 30 June, its arrival delayed at least several days by the resistance attacks and air strikes. Rather than going on the offensive to try to push the Allies back into the sea, Das Reich initially