"In Honor of Our Fathers"; - "Wisdom of the Earth" [Campaign 3, Mission 4]

Thanks, I went into the editor, but I can't find the map in Open_resource, and never mind, I have a different problem right now.
In the last mission of the campaign, only in the second week of the game, I am attacked by such a unique unit http://gyazo.com/14e715fcb22b4de1013768b1b6d7d9bd.png
It is impossible to defeat him; he goes to my main Castle, and I simply lose. Does anyone know how to fight him? I played this campaign a long time ago, but I don't remember such armies appearing in the second week of the game.