The history of Scrum/Agile will not be part of the certification and is hence not necessary to memorize any dates or names.
However let’s get in to some history details of how Scrum/Agile was originated
Scrum was first described by Takeuchi and Nonaka in 1986 Harvard Business Review article “The New New Product Development Game” based on study of successful product development.
Ken Schwaber and Jeff Sutherland collectively presented their experiences in a conference in 1995.
Subsequently, Schwaber and Beedle attempted to communicate Scrum through the first Scrum book Agile Software Development with Scrum.
As the Scrum community started growing, it was decided to create a platform to bring all of them together, which in turn lead to the formation of the Scrum Alliance (SA) and Certified Scrum Master (CSM) certification.
In February 2001, Jeff and Ken were amongst the 17 software development leaders creating the Manifesto for Agile Software Development Scrum was first tried and refined at Individual, Inc., Fidelity Investments And Scrum is now being used by organizations across the globe.