Allenby said:
'They' being who?
They being all of them. I was thinking that most mods tend to slash all infantry types to speed 3 or 4.
Is that a reference to all units or some in particular? What GD rating would be most appropriate?
The way I understand it, GD has a chance to block the enemy attack points. So, if you have an attacker with SA of 3 and a defender with GD of 3, and a chance to block of 2/3 (that's too low, IIRC the standard value is 80%) the attacker scores one attack/hour. If two attacking divisions of 3 SA hit that defending division, all of the attacks of the second division get through, and the attackers are hitting four times per hour. So, doubled odds, casualties increase four times. Going to 3:1 odds, and the defender takes 7 hits/hour. IIRC, each hit takes out 1% strength, or thereabouts, and has a chance to be critical and take 5%. The defending division will be killed very quickly.
I really think a division should be able to take 2:1 odds without being overwhelmed by the attackers. Maybe we should make the point at which they are overwhelmed be 5:1 odds. By overwhelmed I mean that there are so many attackers that the division's defenses can't cope with all of them. The defenders will still lose, but battles take longer, there are far less casualties, and fronts are more static.
Check out Mithel's thread "The Case against Ground Defense". He actually defends removing that overwhelm point by giving everyone 999GD, but I still don't know how that works out in practice.