The Buzz

The US Army’s World War II Tank-Destroyers: Waste of Time or Wonder Weapon?

During the 1940s, the U.S. Army developed a special weapon to counter the tanks of the German Wehrmacht. Most of these vehicles had the hull of a Sherman tank and a turret with a long-barrel cannon.

But don’t dare call them tanks. These were tank-destroyers.

After the war, the U.S. Army concluded tank destroyers were a waste of time. Official histories excoriated the failure of the program.

But a look at historical records shows that tank destroyers actually did their job well.

The tank-destroyer force was the Army’s response to the wild successes of German armor in Poland and France in 1939 and 1940. Panzer divisions would concentrate more than a hundred tanks on a narrow front, overwhelming the local anti-tank weapons of defending troops and rolling deep into enemy lines.

In 1941, the Army concluded that it needed mobile anti-tank units to intercept and defeat German armored spearheads. Towed anti-tank guns took too long to deploy on the move and it was difficult to guess where the enemy would concentrate for an attack. Instead, self-propelled anti-tank battalions would wait behind friendly lines.

When the German armor inevitably broke through the infantry, the battalions would deploy en masse to ambush the advancing tank columns.

The Army didn’t intend for its own tanks to specialize in defending against enemy panzers. The new armor branch wanted to focus on the same kind of bold armored attacks the Germans were famous for.

The Army tested the concept out in war games at Louisiana in September 1941. Tank-destroyers performed extremely well against tanks — perhaps because, as the armor branch alleged, the “umpire rules” were unfairly tilted in their favor. Tanks could only take out anti-tank units by overrunning them, rather than with direct fire.

With the support of the Army’s chief of training and doctrine Lt. Gen. Leslie McNair, tank-destroyers became their own branch in the army, just like armor and artillery already were. A tank-destroyer center began training units at Fort Hood, Texas. Fifty-three battalions of 842 men each initially mobilized, with plans to grow the force to 220 battalions.

Each battalion had 36 tank-destroyers divided into three companies, as well as a reconnaissance company of jeeps and armored scout cars to help ferret out the disposition of enemy armor so that the battalions could move into position. The recon company also had an engineer platoon to deal with obstacles and to lay mines.

The first tank-destroyer units made do with hastily improvised vehicles. The M6 was basically an outdated 37-millimeter anti-tank gun mounted on a three-quarter-ton truck.

The M3 Gun Motor Carriage, or GMC, was an overloaded M3 halftrack — a vehicle with wheels in the front and tracks in the rear — toting a French 75-millimeter howitzer on top. Both types were lightly armored and lacked turrets.

Scooting and Shooting in Tunisia:

Though some M3 GMCs resisted the Japanese invasion of The Philippines, tank-destroyer battalions first saw action in the deserts of North Africa starting in 1942.

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Their most important engagement pitted the M3s of the 601st Tank Destroyer Battalion against the entire 10th Panzer Division in the battle of El Guettar in Tunisia early in the morning on March 23, 1943.

Deployed in defense of the 1st Infantry Division just behind the crest of Keddab ridge, the 601’st 31 gun-laden halftracks moved forward and potted off shots at the panzers as they rolled down Highway 15, then scooted back and found new firing positions. They were bolstered only by divisional artillery and a minefield prepared by their engineers.

Two companies from the 899th Tank Destroyer Battalion reinforced them at the last minute, one of them suffering heavy losses while approaching.

The panzers advanced within 100 meters of the 601st’s position before finally withdrawing, leaving 38 wrecked tanks behind. However, the 601st had lost 21 of its M3s and the 899th lost seven of its new M10 vehicles.

The heavy losses did not endear the tank-destroyers to Allied commanders. Gen. George Patton said the tank-destroyers had proved “unsuccessful.”

In fact, the battle of El Guettar marked the only occasion in which U.S. tank-destroyers were used in the manner intended — deployed as an entire battalion to stop a German armored breakthrough concentrated on a narrow front.

The German army remained largely on the defensive in the second half of World War II, and failed to achieve armored breakthroughs like those in Poland, France and Russia. As a result, the U.S. Army scaled back the number of tank-destroyer battalions to 106. Fifty-two deployed to the European theater and 10 to the Pacific.

Another problem was that tank-destroyer doctrine presupposed moving into ambush positions after the German tanks had already overrun defending infantry. In practice, nobody wanted to consign the infantry to such a fate, so tank-destroyers deployed closer to the front line for forward defense.

The first proper tank-destroyer was the M10 Wolverine, which featured the hull of the M4 Sherman tank and a new pentagonal turret. General Motors and Ford produced 6,400 M10s.

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