Spartan

Spartans are a genetically enginered race of human from the Halo universe.

Physiology
standing at an average of 7 feet tall (fully armoured) and with a rienforced endoskeleton. Thier training and Physical conditioning along with the chemical and genetic enhancements give them super human speed, strength and endurance. To the point where they can punch through solid concrete without doing damage to themselves.

History
The first Spartan program called Project Orion was the UNSC's attempt at mass pruducing super soldiers in order to counter and controll a growing populace.

Although it was considerd a failure by many (the Spartans falling far short of expectations), the idea stayed.

And in 2524AD relaunched as the war against the Covenant erupted. Out of 200 five year olds chosen, only 75 became Spartans as most either died or "washed out" crippled as result of thier training.

although after more than 20 years of warfare most Spartans died at the fall of Reach (2552Ad), all but two were killed;

John 117 Mastercheif and Jun A226 Noble 3

(although there could be five if the three aboard Spirit Of Fire are included, although they were Project Orion not Spartan 2's)