Discover, wage war, conquer, plunder, consolidate, empower, set forth.
That was the line of action he took every time he discovered some new planet or new star system.
During this time, he discovered that he was not the only one on the path of conquest and had even lost to other world dominators a few times, however, he carried on with his conquest, getting revenge on those who formerly defeated him more often than not.
By the time he realised, had been on the path of conquest for thousands of years, maybe two thousand, maybe three, possibly even five.
He had lost count.
Some of his weaker children had perished long before him but his increased existence level let him outlive them by leaps and bounds.
{I don't recall the exact number, but he had conquered 90% of the technologically advanced worlds in this galaxy.}