Info: Rommel, Erwin "Attacks" 1937

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An important tactical observation he made was that suppression was more important than assaulting force. The dominate theory was that the strength of the attacking force was the key to winning an attack. 2/3 of a force would charge the enemy while 1/3 provided fire cover. Rommel observed that a greater covering fire would allow a smaller assaulting force to succeed with smaller risk of casualties and advocated 2/3 suppression fire to 1/3 assaulters.