Infantry Tactics - Trench Warfare Tactics

Trench Warfare Tactics

Because of the increasing lethality of more modern weapons, such as artillery and machine guns, infantry tactics shifted to trench warfare. Massed infantry charges were now essentially suicidal, and the Western Front ground to a standstill.

A common tactic used during the earlier stages of trench warfare was to shell an enemy trench line, at which point friendly infantry would leave the safety of their trenches, advance across no man's land, and seize the enemy trenches. However, this tactic of "preliminary bombardment" was largely unsuccessful. The nature of no man's land (filled with barbed wire and other obstructions) was one factor. For a unit to get to an enemy trench line, it had to cross this area, secure the enemy position, then face counterattack by opposing reserves. It also depended on the ability of friendly artillery to suppress enemy infantry and artillery, which was frequently limited by "bombproofs" (bunkers), revetments, poor ammunition, or simply inaccurate fire.

An improvement was the creeping barrage in which artillery fire is laid immediately in front of advancing infantry to clear any enemy in their way. This played an important part in later battles such as the Battle of Arras (1917), of which Vimy Ridge was a part. The tactic required close coordination in an era before widespread use of radio, and when laying telephone wire under fire was extremely hazardous. In response, the Germans devised the elastic defence and used infiltration tactics in which shock troops quietly infiltrated the enemy's forward trenches, without the heavy bombardment that gave advance warning of an imminent attack. The Allies introduced the tank to overcome the deadlock of static positions but mechanical unreliability prevented them from doing so.

The Germans used specially-trained Stormtroopers to great effect in 1918, during Operation Michael, breaching the Allied trench lines and allowing supporting infantry to pour through a wide breach in the front lines. Even though most of the German forces were on foot, they were soon threatening Paris. Only timely and stiff resistance, the use of reserves, and German logistical and manpower problems prevented disaster. After this spring offensive, the Allies launched a series of counter-attacks with tanks and small units of assault infantry protected by air support and short intense artillery barrages while the main infantry force followed and seized strongpoints. This forced the Germans back and after less than three months the allies had made the largest territorial gains on the western front since the war began. The Germans then sued for peace ending the war.