The last Spartan

In this story I talk about my self as a soldier that looks like a cyborg. So the story will happen in 2552, in which the humans will have a contact with aliens named Covenant. For fighting, the countries made some soldiers advanced with technology, they are Spartans. Already, they have created Spartan John 117 that helped them in battle between humanity and Floods. but the Floods still in life, and find friends, absolutely they are the Covenant. John 117 will disappear, so a new hero will appear to replace the old one. He is me, Saad-118. Can I end this fight between aliens and the humanity?