with the help of dinoscout I've elaborated some cases related to movement priorities. Please comment below what would you do if you were playing the match. There are more than one correct answer (but you can still argue why your is best than other).
In all the scenarios you are the light green player. You can assume any strategy that you desire.
About priorities
The concept of priority is usually the hardest to learn, typically because it relies in the player's capacity to recognize patron of movements and requires to have knowledge about certain game mechanics (specially Turn Blocks, to which it is strictly related). Even between the most experienced players, it can be a challenge to recognize which movement should'be made first, second, or even latest moves.
Case 1: mixing units? - Very Easy
Case 2: Many choices but... - Easy
Case 3: Sea transports on the look? - Medium
Case 4: Let's play ancient! - Medium
Case 5: Looks like nowhere to go.... - Hard Additional information: There are sea transports in Varna, Athens and Thessaloniki. You can't defend a full rush.
Case 6: Marines? Marines! - Very Hard It is reinforcements turn. You can buy 8 marines in each visible city.