Complex sentence: Contrary to what the "Blitzkrieg" legend suggests, the German Army was far from fully motorised; just 10 percent of their army was motorised in 1940 and could muster only 120,000 vehicles, compared to the 300,000 of the French Army.
Split into simpler sentences: Contrary to what the "blitzkrieg" legend suggests, the German Army was not fully motorised. Just 10 percent of the Army was motorised in 1940 and could muster only 120,000 vehicles, compared to the 300,000 of the French Army.