A good Sci-fi reference would be Babylon 5 - "The long, twilight stuggle" episode. Minbari fleet using mass drivers to bomb the Narn back to the stone age.
That was the centauri not the mimbari
I still think that the star wars program is a better idea to use on enemies, the star wars program was a anti space weapon that was started by President Ronald Reagen, the program was used once to try shoot a UFO out of orbit (can see NASA video footage of it being shot) the star wars program is not a laser but in fact the largest Rail gun ever built with a barrel at the length of 103 feet from start to end it fires titanium bullet rounds fired using electron magnets to move the projectile at a speed of mach 7, the bullet is so powerful that when first test fired at 30 foot thick iron alloy in the 1960s it went straight through and kept on going, it was only fired at half a mach what would happen when sent into space i wonder