User blog comment:Fliu/Chapter 944: Big Mom Incoming/@comment-77.49.170.129-20190601082300/@comment-99.72.92.253-20190601194041

If I recall, Drake was once a marine but he chose to be a pirate because he was curious about the experience. He wanted to see what the other side was like apparently. It seems he took after his father in the fact that he was a marine and later became a pirate.