 Meanwhile, along the San Martin–Morata Road, the newly formed XV International Brigade, consisting of a British Battalion, the Balkan Dimitrov Battalion and the Irish, and the Franco-Belgian Sixth of February Battalion, had been hurriedly put into the line to help stem the tide of the Saenz de Buruaga's brigade.Heavy fighting followed and the Nationalist advance was blunted.A furious and confused fight followed in which the British Battalion lost poet Christopher Caudwell and 375 of their 600 men, including almost every officer, including the battalion commissar and Captain Tom Wintringham, in gaining and then holding and finally retreating from a position they named "Suicide Hill".