"Skull and Bones was founded in 1832 after a dispute among Yale debating societies Linonia, Brothers in Unity, and the Calliopean Society over that season's Phi Beta Kappa awards. William Huntington Russell and Alphonso Taft co-founded "the Order of the Scull [sic] and Bones". The society's assets are managed by the society's alumni organization, the Russell Trust Association, incorporated in 1856 and named after the Bones co-founder. The association was founded by Russell and Daniel Coit Gilman, a Skull and Bones member. The first extended description of Skull and Bones, published in 1871 by Lyman Bagg in his book Four Years at Yale, noted that "the mystery now attending its existence forms the one great enigma which college gossip never tires of discussing." Brooks Mather Kelley attributed the interest in Yale senior societies to the fact that underclassmen members of then freshman, sophomore, and junior class societies returned to campus the following years and could share information about society rituals, while graduating seniors were, with their knowledge of such, at least a step removed from campus life.
Skull and Bones selects new members among students every spring as part of Yale University's "Tap Day", and has done so since 1879. Since the society's inclusion of women in the early 1990s, Skull and Bones selects fifteen men and women of the junior class to join the society. Skull and Bones "taps" those that it views as campus leaders and other notable figures for its membership."

Last but not least, it was released in the YouTube channel Skull and Bones' announcement trailer on June, 12th of 2017. If you haven't seem it yet, I'll leave it below:

1. Wikipedia (https://www.ubisoft.com/en-us/game/skull-and-bones/wikipedia)
2. Ubisoft's oficial website (https://www.ubisoft.com/en-us/game/skull-and-bones/)
3. Ubisoft's youtube channel (https://www.youtube.com/watch?v=_9YYYVG0YQI)