And the saga continues.
Today I want to bring your attention to some of the pecularities of HQs and preparation.
TL/DR: Don't leave home without your army/corp HQs - presence is more important than preparation.
The idea was to gain more understanding in what defines adjusted AV. Many things affect it, so I tried to isolate two of the more important and less understood ones - HQ and preparation percentage. Tests have a single Japanese ID attacking a single US regiment in a clear terrain base with forts at level 2. Commanders were edited to have all stats at 60, experience for infantry was set at 50, morale at 99. TOE of ID had 450 infantry squads and 450 support, TOE of US regiment is standard. Attack commensed at the start of scenario, so presumably clear weather all the way. I toggled prep between 0 and 100 both for attackers and defenders, and sometimes added HQs for the attacking side, both army/corp and command ones.
Many of the combinations are yet to be tested, so I want to point out two most important findings (for me)
1. The effect of army/corp HQs is much more important than ~10% to AV which I've seen circulated. HQc have a chance to double the adjusted AV, and all but eliminates leaders(-) penalties, that are usually disasterous (x2 to x4 drops in AV). Command HQ can further double adjusted AV on its own, and the effect is cumulative. With ID+HQc+HQ all at prep 100 I got 1994 adjusted AV once from 450 base. In ~50% attacks AV doubled, while in ~20% quadrupled.
2. Mere presense of the HQc is a big boon (more than x2) to average adjusted AV. Even with prep at zero. See on the picture how adjusted AV of an 100-prep division behaves if 0-prep HQc is added to the hex. With HQc in hex, attacking LCU stops getting leaders(-) almost entirely, while w/o HQ 70% of attacks got this negative modifier which generally halved adjusted AV.
3. Prep itself matters for LCUs, but not as much as HQ presense. Defending regiment with base AV 127 gets average adjusted AV ~50 with prep 0, and ~70 with prep 100. Adjusted AV is still consistently lower than base, but preparation alleviates some of the negative effect
Great find. This HQ effect is far more useful than HQc 10% combat bonus and better healing of damaged squads that are mentioned by the manual and devs. Alas, HQ units are scarce for any combatant nation but China.