I just got into Cossacks 3 and have started watching the Season Clashes from the start on the Cossacks 3 YouTube channel. During the first Season Clash people were building 1 Mill and in only a few rare cases did they build a second such as if their economy was increasing and it was going to be a long game etc. Towards the end of the clash, like the last two games they started building 2 mills as Ukraine (probably because of Unit upgrades) and the commentators were laughing at this because it seemed odd to them. I then started watching the second clash that would have come around much later and barely a single game went by in which people have built 1 mill, they all build 2. Does anyone know what happened in between that made 2 mills a necessity?