Mercenary forces became adept at outflanking and then reducing Simba positions with enfilade fire. French reinforcements increased the possibility of a reciprocal French outflanking manoeuvre. They then advanced northwards, outflanking successive British defensive positions. It also uses roadside bombs to prevent outflanking maneuvers, particularly at night. The Azad Brigade advanced, by outflanking the Anglo-American positions. On 30 July they broke through south to Greater Veranda, thereby outflanking the defile. Yevdokimov's policy of outflanking the enemy was important. He therefore attempted a bold outflanking move against Gough. Reservoirs and flooded fields prevented the Indian Division making any outflanking moves. During the attack an outflanking movement was made. Five days later the Army liberated Sebezh after a deep outflanking movement. The attempt at outflanking the Winter Line had failed. At the same time, Ewell's men were outflanking the extreme left of the Union line.