The Marder I "Marten" (Sd.Kfz. 135) was a German World War II tank destroyer, armed with a 75 mm PaK-40 anti-tank gun. Most Marder Is were built on the base of the Tracteur Blindé 37L (Lorraine), a French artillery tractor/armoured personnel carrier of which the Germans had acquired more than three hundred after the Fall of France in 1940.