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It was the orange player who went down into the Dungeon, captured the mine, and then headed towards the Castle. I didn't know where the Castle was. So, I ended up at the dragons first, who demanded 100 archers. Then I found the Castle. Apparently, the patrol stops being considered a patrol if it's not throughout the entire Dungeon, or at least in the Castle. And I saw the other player later, when he was running past the Castle.
Added after 14 minutes
I played this mission in version 1.3.
It doesn't matter which version. The question is that you don't give 100 archers in this mission. And you couldn't have attacked the orange player, otherwise you would have failed the mission.