I have this problem in my current game: i have a lot of pikeman ,and just have discovered gunpowder.Normaly ,i could update to a musketman if i had salpeter ,but i'm playing as the French and musketman are musketeers for them ,only ,you CAN'T update pikeman to musketeers.Rusult: i have to disband all pikeman :mad: and create new musketeers.I hope this isn't the same for other special unit's.