I forgot to mention that it's a complete walkthrough... each major digit represents a day, and what follows it represents the sequence of moves in ascending order; zeros are for convenience when loading during the walkthrough... don't go crazy while watching.

:) Yes, I figured out your numbers right away and have already checked everything. The walkthrough is flawless ;) I understood my mistake. I was just so eager to capture the fortresses on the 4th day simultaneously. So that I could try to catch the scattered monsters with the purchased units on the 4th day. And you probably looked at it and gave up on the 4th day. Therefore, unlike me, you took the fortresses on the 5th day. And because of that, you had the strength and resources to leisurely and unhurriedly develop a powerful unit on the secondary direction!! I was lucky that I got an artifact +4 knowledge! ;)
PS. Even though I took both fortresses on the 4th day, I couldn't reach one monster on the right side with anyone!! I got tired of it and gave up on it :)