As per Wikipedia:
Guardians of the Galaxy (retroactively referred to as Guardians of the Galaxy Vol. 1) is a 2014 American superhero film based on the Marvel Comics superhero team of the same name, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. It is the tenth film in the Marvel Cinematic Universe (MCU). Part 2 was released in 2017.
So my question is, which galaxy does the film's name "Guardians of the Galaxy" refer to?