After the failure of Shingle, a large reorganisation took place. Previously the Apennines had been the rough dividing line between Fifth and Eighth Armies. However, the dividing line was shifted westwards, to allow the concentration of both armies on the western side of Italy for maximum firepower to break through to Rome. British V Corps was left on the Adriatic coast to pin down any German units there. Fifth Army was relieved of responsibility for Cassino and the final phases of that battle saw Indian, New Zealand and finally Polish troops thrown against the fortress. Fifth Army also lost McCreery's British X Corps at this time, since it was felt that having exclusively American-organised units under Fifth Army and British-organised units under Eighth Army would ease logistics.