But an early Germany already has many arm and fighters for good skew.
I think it’s all relative.
Germany DOES have a lot of tanks, and a lot of fighters in the beginning. However, Germany does not have ENOUGH tanks to establish, say, a firm strongpoint at Ukraine on G2, unless Germany produces tanks on G1.
I’m not saying don’t buy arm, but early on I think art is as useful to GER as arm is.
Useful in what sense? Armor are immediately usable to establish a forward position. Artillery are not. Artillery are useful for supplementing the attack mid to late game (by which point they can be moved to forward positions).
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Artillery have the advantage of being able to SUPPLEMENT INFANTRY for a cost-effective attack. Artillery MUST be used with infantry, and when there is not enough infantry to support the artillery, the artillery become cost-ineffective.
The artillery can be used in initial attacks after which a retreat can be made, but THINK of the conditions under which artillery can be used, and I believe you will find that artillery are not generally useful, except perhaps as dispensible supplements to infantry (but even then, that should not be necessary with fighters)
Let us say that your opponent is defending a territory with ONE infantry. Optimally, you would attack with two infantry and a fighter, but say that option is not available. So if you have artillery, then you can chance a 2 2 battle against a 2. Not spectacular, but superior to 1 1 against a 2.
However, remember that your opponent will counterattack on the next turn. Although you have the advantage on cost-efficient attack, artillery are no better than infantry on defense, and cost more.
So admittedly, artillery are cost-efficient when fighters are NOT readily available to EITHER side. However, artillery still face the not inconsiderable problem of needing to be mobilized, as well as the problem of the opponent probably having fighters to counterattack, trading infantry for artillery.
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What if the opponent has a mass of units? Until the initial stock of infantry is depleted, artillery attack at 2 and boost an infantry to 2 for 4 IPC, and tanks at 3 for 5 IPC. That’s 75% for artillery and 60% for tanks. However, once you lose infantry surpassign the artillery count, that’s 50% for artillery and 60% for tanks. My thought is that in a massive battle, infantry fodder will quickly be exhausted, after which tanks will be more cost-effective on the attack.
Add to that the fact that infantry/artillery forces in one territory with reinforcing infantry/artillery in the territory behind that ONLY threaten with the power of the forces in the first territory. Were the infantry/artillery in the territory behind tanks instead, there would instead be a significantly more powerful attacking force.
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In sum - I think artillery are useful enough to build, but the problem of infantry casualties means that artillery should only be produced in very limited numbers.