Sky Masters of the Space Force was an American syndicated newspaper comic strip created on September 8, 1958, by writer/artist Jack Kirby, artist Wally Wood and writer Dave Wood, featuring the adventures of an American astronaut. The strip stars the titular Major Skylar Masters—an American astronaut—and features his adventures in a fictionalized Space Race, including rocket launches, space stations, Moon landings, and double agents.

Sky Masters of the Space Force began life as a science fiction strip created by artist Jack Kirby and writer Dave Wood called Space Busters, which was designed to be sold to a newspaper syndicate. This strip did not sell, however.^{[citation needed]}

In 1958, Harry Elmlark, "an agent from the George Matthew Adams Service", asked DC Comics editor Jack Schiff for a science fiction comic to be adapted into strip form, to capitalize on American interest in the Space race in the wake of the previous year's launch of Sputnik. Schiff rejected Space Busters and then either collaborated in the creation of a new strip, or simply encouraged Kirby and Wood to produce "a strip that dealt with rocket launchings, moon shots, and general story lines just a little ahead of current developments in the news".

Wally Wood's first wife Tatjana Wood recalled in the Wood biography Wally's World that it was Jack Kirby who sought out the science fiction artist to collaborate on Sky Masters. Wallace Wood had previously worked on EC's Weird Science, Weird Fantasy and Wood was invited by Will Eisner to collaborate on the Outer Space Spirit newspaper series. By the time Kirby was thinking about a space strip, Wood had given up comic book work for higher-paying magazine and advertising work, including Mad and illustrating science fiction stories in Galaxy, Worlds of If, and other American magazines and books. Wally Wood accepted Kirby's invitation.

With art samples and story outline approved by Elmlark, Kirby penciled the strip, which was initially written by brothers Dick and Dave Wood and inked by the unrelated Wally Wood; at that same time, Dave Wood was also working with Kirby on the Showcase Comics issues of Kirby's "Challengers of the Unknown" feature for DC Comics, and Wally Wood would later ink issues #4-8 of Kirby's Challengers of the Unknown comic book series during the last half of 1958 and the first half of 1959. Once Kirby and Schiff got into a dispute, Wally Wood moved on to other projects. Later Sky Masters strips were written by Kirby, and inked by Dick Ayers, with the final month penciled and inked by Kirby alone.

Ayers described his participation in a 1996 interview:

I also began [work on] Sky Masters, the newspaper strip. There is a lot of confusion on this; people think Wally Wood inked them all, because they're signed Kirby/Wood. But that was Dave Wood, the writer [who was unrelated to artist Wally Wood]. I began Sky Masters with the 36th Sunday page; Jack's pencils, my inks, in September of 1959. I ended the Sundays in January 1960. I also did the dailies for a period of [over] two years, from September of '59 to December of '61. These were complete inks; I was the only one doing it at the time. Of course, Wally Wood also worked on that strip, in the beginning, before me."

Dave Wood promised Schiff "a percentage for arranging the deal", which Kirby allegedly assumed was a one-time payment but that Schiff understood to be on-going. In Spring 1958, pre-publication, Kirby verbally agreed to pay Schiff an ongoing percentage, in large part to safeguard his (Kirby's) lucrative relationship with DC. But confusion over whether the percentage should come from gross or net income (and the apparent expectation that Kirby would personally cover the strip's production costs) strained the relationship between Kirby and Schiff. Kirby also butted heads with writer Dave Wood, requesting a higher percentage of the royalties, ostensibly to cover costs of paying Wally Wood for inking. When Kirby threatened to leave the strip, Schiff implied Kirby should ink himself, and noted that Dave Wood required money to pay his brother, Dick, who was helping with the writing.