However, on a battle (between Rostov and Stalingrad to help you find it in the save), I got a reserve activation when I had 222 CV and the defender had only 41 cv. That is a ~1:5 ratio for the defender, even worse than 1:4. Even if you add the defender's support units, that would bring up the CV to 46 for the defender, and it would still be less than a 1:4 ratio. And even if you ALSO assumed that each of the support units and also the division itself rounded up by 1 CV on top of that, that would bring up the CV for the defender to 51, and 51/222 = 0.22972972973, still worse than a 1:4 ratio for the defender.23.7.1. Reserve Unit Commitment
To be committed in defence, a unit in reserve mode must be within 6 hexes of the
battle hex. To be committed to an attack, a reserve unit must be within 3 hexes of
the battle hex.
A unit in reserve mode may never commit to a battle if it is adjacent to an enemy
unit. A unit in reserve mode will never commit into a battle if the initial combat value
(CV) odds ratio is over 10 to 1. A defending reserve unit will also never commit into a
battle if the odds are less than 1 to 4.

Also if I hover over the 91st rifle division, the estimated CV is 5.3, which would still make the odds worse than 1:4 for the defender. Besides the fact that it would no make any sense for the defender's reserve activation to depend on the attacker's estimated CVs, because the defender would not know the attacker's intel estimates.
Save here - https://cdn.discordapp.com/attachments/ ... le_Bug.psv