Retreats to and reinforcements from adjoining cities may then occur, then another round of combat is fought. There are several special rules to show the effects of troop quality, entrenchment, cavalry, etc. After combat, one winning unit per battle may be promoted to the next level of quality. During the winter turn, units may be promoted instead of marching. Also during the winter turn, recruitment takes place, with levy quality troops appearing in certain cities.
Supply introduces magazine units which are needed to support attacks.