sailors
"Jazz Age", "The Roaring 20's",
The Roaring Twenties.
The Roaring 20s because of the innovations.
The decade of discontent, or the decade of peace, love, and harmony.
Ys - series - was created in 1987.
Ys Strategy happened in 2006.
Ys Origin was created in 2006.
Ys Origin happened in 2006.
Ys Seven happened in 2009.
Etienne Ys was born in 1962.
It could possibly be, OBU. Otherwise, known as the One Big Union. Not quite an invention, but it was created in the Roaring Twenties.