Probably the first time I convinced an AI empire to surrender to me.
But a recent PBW battle runs a close second. My fleet wiped out my opponent's, despite all expectations I'd had from the results of simulator battles.
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Cap'n Q
My first mod!
Hypermaze quadrant
The most merciful thing in the world, I think, is the inability of the
human mind to correlate all of its contents. We live on a placid
island of ignorance in the midst of black seas of infinity, and it was
not meant that we should go far. -- HP Lovecraft, "The Call of Cthulhu"