The Fandom Star Trek Chronology was James Dixon's opus magnum. It was his obsession to bring order to a disorderly universe, and he did this through the Chronology.
Star Trek has taken many forms: TV, movies, novels, short-stories, technical manuals, blueprints, comics, fan-fiction, costumes, props, artwork, action figures, toys ... you name it, the Star Trek name has probably been on it. The Fandom Star Trek Chronology was Dixon's attempt to fit it all together. He took every single piece of Star Trek lore ever published in any form and tried to build a coherent whole from it.
Dixon literally dedicated his life to bringing a chronological order to Star Trek. He worked on the Chronology for at least two decades, adding new material as it became available. He defended it with an intensity that was occasionally vicious.
Dixon's most enduring legacy may be the documentation and listing of his sources. Dixon's knowledge of all things Star Trek was beyond thorough and is reflected in the Chronology. Some sources are obscure or have been out of print for decades: this may be one of the few places that they are ever mentioned.