[quote=@Monkeypants]
No such thing as "underpowered" when it comes to writing a story.


Look at halo. Aside from playing as pretty much mecha Jesus, humanity was just pos backwater fucks that beat a conglomeration of alien warriors with superior technology.
[/quote]

Taking a small (in relativity to warships) device, armed with shields, RCS boosters and a really really powerful artificial gravity generator, you could probably crush a ship, even a Covenant ship, just by laying a minefield of them and turning them on when a fleet gets nearby. After all, these spaceships aren't meant to support themselves under the stresses of gravity.