Basically what it says in the title. As it stands right now, when the aliens run an infiltration mission in a region, they always seem to take over the same country (e.g. an infiltration in Europe always targets UK first, US for North America, China for Southeast Asia). While I cannot state with certainty that the order is fixed, I tested this recently by setting the first alien mission in a campaign to an infiltration; the aliens invariably infiltrated the same country in each region tested, each save I tested on. Adding an option to randomize this makes it harder to predict the aliens' actions, increasing replayability and strategic difficulty. Thanks in advance for your time.