three phases. The initial assault would be carried out by the 56th British Infantry Brigade who would cross the IJssel at night in amphibious Buffalo IVs of The Ontario Regiment before clearing the eastern and southern districts of the city. In phase two, the 146th British Infantry Brigade would move forward and attack the high ground north of Arnhem. In the third phase, the 147th British Infantry Brigade would advance through 56th's positions and secure the high ground and north bank of the Nederrijn west of the city. With the heights around Arnhem secure the 5th Canadian Armoured Division would advance through the city and I Corps would resume its advance west. The British took several Canadian units under command along with Churchill Crocodile tanks of the 79th British Armoured Division. Most of the 1st Canadian Infantry Division and 5th Canadian Armoured Division were placed in support, and a composite group known as Murphyforce provided a diversion south of the Nederrijn. The river crossing would be assisted by landing craft of the Royal Navy, including the 509th LCA Flotilla and 660, 661 and 662 LCM Flotillas, a total of 45 craft. The Royal Army Service Corps (RASC) would run DUKWs across the river during the operation. I Corps' Royal Canadian Engineers (RCE), would build four Bailey pontoon ferries as soon as locations on the enemy bank were captured (two across the IJssel and two across the Nederrijn). The RCE would also deploy a prefabricated Bailey bridge as soon as the situation allowed it. The bridge was built in advance further upstream at Doornenburg and floated nearer to the IJssel just prior to the attack. As soon as the situation allowed it this bridge would be floated into position between Westervoort and Arnhem, hopefully allowing armour to cross the river much faster than the enemy would expect. Canadian pioneers would lay a heavy artillery smokescreen over Arnhem during the attack and in the buildup to the battle they maintained the smoke screen along the Nederrijn, in the hope it would deceive the Germans as to the true direction of the crossing. Allied order of battle 49th (West Riding) Infantry Division GOC Major-General Stuart Rawlins 56th Infantry Brigade, CO Brigadier R.H. Senior 2nd Battalion, South Wales Borderers 2nd Battalion, Gloucestershire Regiment 2nd Battalion, Essex Regiment 146th Infantry Brigade, CO Brigadier D.S. Gordon 4th Battalion, Lincolnshire Regiment 1/4th Battalion, King's Own Yorkshire Light