It's a high seas free-for-all. Players receive a frigate to keep as part of the entry. Prizes for the highest number of enemy kills. Sunk? You can re-enter the next turn.
Classic WW1 dog fighting. Players receive a plane to keep as part of the entry. Prizes for whose who rack up the most kills. Shot down? You can take to the skies next turn.
Classic WW2 dog fighting. Players receive a plane to keep as part of the entry. Prizes for whose who rack up the most kills. Shot down? You can take to the skies next turn.