Who was Spike fighting in the dogfight?

The guys who had captured him before that he escaped from. That's my guess.

I too am childish and hate to lose.
http://mrsspooky.net/bebop

Mars army, or police, fighters. Given the hardware and his comment, I took them to be army, called in because of the public emergency.

Either way, they were public, not private (eg, not belonging to the medical corporation).

The bigger the government, the smaller the citizen.