Highway of Death, eh?
No objections, whatsoever. Standard military practice. Effectively rout an enemy force and prevent them from re-grouping by attacking them while they attempt to effect a withdraw.
This shit is so old that it's one of the reasons that cavalry was first invented.
"You should all get an account. I believe that Dissenter has the capability of becoming one of the next big things in tech." - Styxhexenhammer666