During the night of 11 February the newly formed XV International Brigade arrived under the command of General ‘Gal’ (Janos Galicz). His chief of staff was Major George Nathan, widely regarded as one of the most competent officers in the International Brigades. The British battalion was on the left, under the command of Tom Wintringham, the Franco-Belgian ‘6th of February’ Battalion in the centre and the ‘Dimitrov’ on the right. The brigade advanced through the sodden olive groves under heavy enemy fire, which allowed them no respite.3
Gal’s orders were to attack the troops of Sáenz de Buruaga on the San Martín–Morata road. The American battalion was being hurried through induction at Albacete to be ready to reinforce them.The next day Asensio’s troops captured the commanding feature of Pingarrón, while to the north XI International Brigade and the 17th Brigade just held on at Pajares. The British battalion bore the brunt of the attack on the south of the road. They lost over half their men in capturing, then defending, ‘Suicide Hill’ with their Maxim machine-guns until they ran out of ammunition.4
The French ‘6th of February’ Battalion on their right was forced back. The British received no warning of what had happened and their machine-gun company was captured by a group of‘Suicide Hill’ could be held no longer and the whole brigade had to fall back. But a breakthrough in the centre had been prevented, because the nationalists believed republican forces to be much stronger. They also failed to discover the weakness on XV International Brigade’s southern flank.
The British battalion had lost 225 men out of 600. Wintringham himself fell badly wounded and the communist novelist Christopher Caudwell was among those killed. Meanwhile, on its right flank, the brigade’s Dimitrov Battalion of Balkan exiles and the re-formed Thaelmann Battalion of XI International held off an equally severe attack. Very heavy casualties were inflicted on the
In the rolling hills and olive groves to the east of the Jarama between Pajares and Pingarrón, attack followed attack throughout 13 February, as Varela became desperate to achieve his breakthrough. Eventually the Edgar André Battalion of XI International Brigade was forced back as a result of fire from a Condor Legion machine-gun battalion and 155mm bombardment from La Marañosa. The shellfire also destroyed brigade headquarters and cut all field telephone lines to the rear. Barrón’s column took advantage of this gap at Pajares and his attack turned the right flank of XV International Brigade. Since the other nationalist formations had already been fought to a standstill, Barrón’s troops pushed on alone towards Arganda on the Valencia road.
The front was on the point of disintegrating that night as XI International Brigade and its flanking formations fell back trying to reestablish a line. Varela was worried by the fact that Barrón’s brigade was exposed, so he ordered him to halt until the other columns could protect his flanks. It was to be the furthest point of their advance, for the next day 50 of Pavlov’s T-26s counter-attacked in what could best be described as a confused charge of mechanized heavy cavalry. Although not a success in itself, this attack gave the republicans enough time to bring forward reserve units to consolidate the centre of the sector.
Richthofen jotted down what he heard from nationalist officers. ‘Red opponents before Madrid–tough fighting. French, Belgian and English prisoners are taken. All shot except for the English. Tanks well concealed in the olive groves. Many dead are lying around. The Moors did their work with hand grenades.’6
Why British prisoners were spared is not clear. Perhaps Franco, on German advice, had judged it safer not to outrage the organizers of the Non-Intervention Committee.Mola was by now extremely concerned at the way the offensive had halted. He, too, was obsessed with the idea of Madrid and he had persuaded Franco to let him commit the last six battalions in reserve, but these units could not even replace the losses the columns had suffered. Both sides had fought to a temporary standstill. Front-line troops had sustained fearful casualties in charges of hopeless bravery. Both sides were also weakened by hunger because the intensity of the fighting had often prevented the arrival of rations. The republican general staff had reacted so slowly to the crisis that fresh units were not in position to take advantage of the nationalists’ exhaustion by counter-attacking. The only reinforcement available at this point was XIV International Brigade, which consolidated the centre of the sector between Arganda and Morata.