Our scout ship to Betelgeuse had few weapons, and the local weaponry hopelessly outclassed those she did have.  They fired first of course, and they got a few good licks in on our scout ship.  Then she used her Peloran gravity generators to bring her effective mass to near zero and lit up her main drives.  Betelgeuse had never seen a ship accelerate so fast and their guns simply couldn’t track her.  It took a brave captain to slow back down and talk after that.