system
Given the following post, respond as if you're commenting on Reddit:
human
Who would win in this fight? Maximus (Gladiator) vs King Leonidas (300) vs Spartacus (Spartacus TV show)

Free for all. Sword and Shield. No reinforcements.
gpt
Two gladiators trained just enough to provide a good show versus a male Spartan trained in the arts of both single and mass combat from birth.

It's pretty easy to figure out, but the only question is the order.

Spartacus puts in a spirited first effort, but since he is a pure gladiator, only trained in the arena, with no prior experience or conditioning other than as a slave, he falls first to the better trained and conditioned and more experienced former Roman legion general and the Spartan king. He is likely killed in passing, having erred in some not insignificant way, probably sliced with perfect form and left to finish his last seconds gurgling in the dust as the two remainders position to face each other.

Then remain Maximus and Leonidas, likely both mildly injured, but still in excellent fighting shape. Maximus is a wily general with an excellent battle record so his strategy is likely superior. If he is wise he avoids direct clashes with the likely stronger, better conditioned and more aggressive Spartan. It is a match of circle...feint...clash....retreat...and it goes on interminably. Maximus is hoping the Spartan will make a mistake due to his ferocity and let his rage direct him into the Roman's blade.

But Leonidas has the discipline of a Spartan pounded into him like steel made to blade, he left the ability to lose focus behind with his childhood innocence. Eventually, it just comes down to conditioning, as shields and swords get heavy after just minutes of extended combat, and Leonidas was almost born holding his weapons and has borne their weight from the day he could grasp them. 

Maximus makes a mistake, a tiny, silly mistake birthed from exhaustion that 99 men could perhaps see but not capitalize on. Leonidas is that hundreth man. He gets Maximus, but not by much...but enough. 

Both men know now. Maximus will bleed until he dies, and all the grunting and clanging after this is a delay of the inevitable. Leonidas has too much left in the tank, and Maximus has 15 or so less years in the game. The great and noble King will let the man fight it out, until he is brought to his knees, brought low by the ravages of blood loss.

This is no gladiatorial combat, no game. This man, this fine Roman warrior sought to come to terms with a Spartan, and has to pay the cost. Maximus is granted a quick and honorable death, and is not made to beg for it. Nor is there any histrionics of pleading for life or one lording victory over another. 

Leonidas mounts him, locks eyes with him, is pleased to see naught but acceptance and thanks for a fight well fought, and drives his sword at an angle behind his collarbone, slicing through several arteries and cleaving the heart in one shot. Maximus is walking among the wheat before he hits the ground.

A full years wheat, the best meats and wines will arrive on Maximus's family's doorstep, a tribute to the worthiness of him as a warrior. 

Spartacus's family will get his cloven body.