Complex sentence: The'Shock' armies were created with the specific structure to engage and destroy significant enemy forces, and were reinforced with more armoured and artillery assets than other combined arms armies: mechanised, tank and cavalry formations and units.
Split into simpler sentences: The'Shock' armies were created with the specific structure to engage and destroy significant enemy forces, and were reinforced with more armoured and artillery assets than other combined arms armies. Where necessary the Shock armies were reinforced with mechanised, tank and cavalry formations and units.