The P40 which was the only Italian made heavy tank during WWII. It featured a bogey-style suspension, a riveted hull construction, and had sloped front and side armor which was a first for Italian tanks. A 420hp V8 liquid-cooled gasoline engine powered the P40 and came armed with a 34 caliber 75mm gun making it the most powerful Italian tank known. However, due to slow production, only 21 units were completed of which non saw action in Italian colors before the Armistice in September 1943. After the Armistice, German forces focused their attention on the P40’s offensive abilities and pressed approximately 100 units into service where they saw action along the Adriatic coast in Northern Italy. Approximately 40 units were engineless and were used as static emplacements at defensive positions.