2510, the Office of Naval intelligence reexamines the Carver Findings and the improved report building upon the prior findings by one civilian scientist, Catherine Elizabeth Halsey, then aged eighteen. Oni's projections matched the grim conclusions of Carver's report up to the year 2525. However, the independent research performed by Halsey predicted a far darker outcome of the projected conflict between the Inner and Outer Colonies of Mankind, that the inaction of the UNSC would spark a war that lasted at minimum for three decades and with the lowest estimated causalities surpassing five billion. The worse case scenario Dr Halsey predicted, the collapse of space fairing human civilization. Upon presenting her independent research to the Office of Naval Intelligence, Catherine Halsey accepted a position within Section III's Special projects division, to conceive a solution and counter to the anticipated interplanetary conflict.

2511, The second generation of the failed super solider project ORION, is initiated, and swiftly renamed by Halsey into the SPARTAN II Project to distance it from the deficiencies of the prior program and the radical shifts from the original project. The most controversial being the selection of the candidates, Young Children selected for their genetic disposition to superior physical and intellectual traits, raised from age six upon and taught warfare and militaristic values to achieve a supreme understanding of war and instill utter loyalty to the UNSC's interests. To screen for select suitable candidates for the program, a database was constructed through the Outer Colony Vaccination program. Initial funding allowed for three hundred candidates for the program, but budget cuts and relocation to other covert and top secret projects, reduced the candidate pool by half.

2517, One hundred a fifty children suitable for conscription into the SPARTAN II Program had been found through the Outer Colony Vaccination Program. However, before the collection of the subjects could begin, the funding available to Halsey and her project was further reduced. In another timeline, the initial suggested reduction of halving the Program's available resource again by half, may have gone through, reducing the tally of the first class of Spartans to a merely seventy five. However, coincidental factors, including the disappointing results of other blacksite projects and a certain high ranking official being caught suddenly ill when budgetary discussion were held, had reduced the loss of funding to the SPARTAN II program by one third instead, for a total of one hundred candidates. Children who would otherwise have lived their lives as civilians, ignorant of the horrors of war, both between the colonies and a threat yet to emerge, are in this version of events, instead chosen and taken from their homes to be trained and raised into SPARTAN super soldiers
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