Guild Wars 2

Skill 4 of banners become “Wear Banner” and char sticks it on his back like any other back item.
This way we can have real “standard bearers” and banners would be viable for mobile fights (also removing the need to constantly replace them).

Japanese armies did that, I think their banners were called “sashimono” and they carried them on their backs.

I think a better suggestion would be when commanders in WvW turn on their tag, they will also be carrying a banner with their guild emblem. They will still be able to fight normally but the banner will be sticking out from their back like in your picture. If commanders are visible to all friendly players and their presence do make a difference in organizing forces, then I think the enemy should be able to spot them as well.

This would be a fun idea for commanders.
I’d also advocate that the commander squads carry the commanders guilds flags as well. I think it would make WvW herding cats v2.0 more efficient and understanding of the armies by guild type not by commander name.

Case in point – about 1 month or so ago when BG / JQ / SoS were fighting in EB, SoS went on the offensive with 2 main armies – one based on Commander Patone and the other based on Commander Randall. It was too confusing to be using “get on Randall / get on Patone” so we named the two armies by their function – Patone was on main army duty, while Randall had over 15 commanders with him and we dubbed them Commander army. Things like this help the WvW community by making easy to join adhoc groups which are established.

By having a preset “army” group provided with the commander and squad flags this will really help organization.