Chapter 13xE: The Peddler Merlinus
Chapter's objective: Protect Merlinus for 7 turns.
Some myrmidon and a brigand will go to attack your starting area, but they won't be any trouble if we use Oswin and Guy. Lastly, the boss is around the top left corner, attacking him is not very recommendable because he's higher-leveled than you (problem is, he's too fast), but you can try if you want, but do remember that you don't have to kill him to finish the mission. If you want to kill him, you best option is to send Oswin, Hector and Marcus. Marcus should be used as a defensive unit and only to help clearing a path to the boss. Use everybody else to finish off as many enemies as possible and if they're nomads, surround them to stop them from attacking. Obviously, attack the boss with spears with Oswin or Lowen.
Once you've finished this mission, the merchant Merlinus will join your team. Merlinus will deploy his tent in battle, and all items that your units can't carry will be sent to him. If he's killed, he disappears, but he'll return alive for the next mission, but he won't level up. At level 20, he'll transform into a carriage, his utility is the same, but he'll be able to move. Take into account that without him you'll have to drop an item if a character of yours obtains an item while having the inventory full. But if you manage to promote him, you'll have a character with great evasion that you can use as bait on the last chapters. Very useful... so always use him.
Strategy for Eliwood Hard Mode: