Thanks WarDog @Krieghund !
I haven’t been able to post a map picture, but after thinking about it more, additional context of the German army disposition in nearby territories could impact the decision as well, as they would be the next power in theater to move. If France taking Kaz’ would prevent any armored and mechanized forces from Novosibirsk moving through Kaz’ into the Caucasus, it may be woth sacrificing the 1 IPC income to prevent Germany from securing a 5 IPC bonus. Always multiple points of context to consider, which makes for a very rich gameplay.