The L.F.S. stalions wake, a Freedom class battleship, was sent to investigate the strange transmission sent by that deep space Sat. When they arrived, they had no idea what was to come.
And yes, I looked it up: there are shields (in SBY, at least) that can absorb TWMG shots. So, because the Transit wave motion guns are from SBY, this is a cannon thing for them.
