In this presentation I delve into the unique potential of future
space-based gravitational wave observatories like the Laser
Interferometer Space Antenna (LISA) for surveying double compact objects
within our Milky Way. I will discuss how such data from LISA will
revolutionise Galactic studies. Central to this presentation will be
double white dwarfs (DWDs), the most prevalent type of binary system
observable by LISA, and how they can elucidate on various facets of not
just our Galaxy, but also the Magellanic Clouds, Andromeda, and the
smaller satellite galaxies in between.