Regiment RA, 260th Battery, 65th (Norfolk Yeomanry) Anti-Tank Regiment RA, a platoon of the 151st Brigade Anti-Tank Company and a motor-cycle scout platoon of the 4th Battalion, Northumberland Fusiliers and a Left Column of the 4th RTR, 6th DLI, 368th Battery, 92nd Field Regiment RA, 206th Battery, 52nd Anti-Tank Regiment RA, a platoon of the 151st Brigade Anti-Tank Company, one company and a scout platoon of the 4th Northumberland Fusiliers, were to cross the Arras–Doullens road at which meant that the infantry would have to make an approach march to reach the jumping-off point, over roads filled with traffic and refugees. Battle 3e DLM An advance by the 3e DLM, to screen the right flank of the British force was also poorly prepared with insufficient liaison, the French not being told of the timing and direction of the British attack. In the confusion an exchange of fire occurred between the French SOMUA S35s and British anti-tank guns near Warlus. An anti-tank gun was knocked out, British soldiers were killed and several French tanks hit before the mistake was discovered. During the evening, the French force, with about six SOMUAs, engaged south of Duisans. British troops were retreating and by the time the German tanks broke through, the British had escaped. Right Column The time taken by the infantry to reach the assembly points for the attack, through the refugee traffic on the roads, left little time to study their orders or reconnoitre. Marœuil was being bombarded when 50th (Northumbrian) Motor Division began the advance. The Right Column advanced at and received small-arms fire from a wood. The column had to fight through Duisans, which was occupied by German infantry and French tanks on the right, reported tanks of of the 7th Panzer Division to the west. Two companies of the 8th DLI and two troops of the 260th Anti-Tank Battery were left to garrison the village and then the depleted column captured Warlus against stronger opposition and had to leave another garrison behind. Berneville to the south was also captured and a party of the 7th RTR and 8th DLI pressed on to the Arras–Doullens road, where they met part of and troops of the SS-Totenkopf Division. The British were forced under cover by machine-gun and mortar fire and the attacked the Right Column for twenty minutes. Junkers Ju 87 belonging to I, and III , Sturzkampfgeschwader 2 dive-bombed British