 Malevergne was familiar with every turn and bar in the Sebou river channel, knew all of the shipping which was engaged in the coastal trade, and provided important information concerning pro-Nazi political sentiment which was stronger in the Port Lyautey area than in any other section of Morocco.Outline plans were drawn up in London for the assault on Port Lyautey by Gen. Truscott and his staff.Capturing and stocking the airfield at Port Lyautey was the primary mission.