It was a game at a low skill level and my opponent selected the Sicilians and quickly sent Donjons to my base in the Feudal Age.
I, playing as the Japanese, created Man at Arms and Archers to try and stop them, but it wasn’t successful so I had to move my farming to the other side of my Town Center.
Subsequently, I sent the Archers to his base to disrupt his stone production.
By that time, he had already built up five Donjons around my base.
When I reached the Castle Age, I had very few units, but then he suddenly resigned right after I got there.
I didn’t understand why he did that; his economy was likely worse than mine, and I had no units to attack his Donjons.
It felt like an undeserved victory on my part.