What does attacking backwards mean?

attacking backwards meaning in Urban Dictionary

Nowadays, always comically explain a retreat in internet based struggle games.However, in past times, lots of causes such as the Mongol Horde, Napoleon's Grande Armee, Rommel's Afrikan Corps, Darius' Immortal Spada and so on...used this tactic to draw down opponent forces, discourage them from chase while escaping from adversary energy, divert interest far from various other attacks going forwards and/or just to remaneuver around the battlefield.