As @dvangennip already mentioned, each unit already has a specific attack cue for animals and the such, after seeing this I just thought it was a bit odd archers and javelin units were so worthless in close combat, archers would obviously be on the weaker side, but javelin units? I mean, javelins are sharp whether thrown or stabbed. For slingers, not to sure actually, I mean they could actually use their sling as an actual weapon, or pull a knife. For melee units, not many carried both (Blade and Bow) but many shield-bearers and spear units had a secondary sword for when the threw their spear, or after first push (After opposing side already ran or rammed into them.) I just really liked the recent balancing update (Mauryans on walls with bows is totally not op at all >.>) but why not take it one step further? Also @stanislas69 we do know that animations would be a lot of work, but realistically, they could just recycle them between units. As in as archers switch to melee to kill animals, the melee units could use the second half of that animation (When they sheathe the dagger and reequip bow) Also about units torching buildings and capturing them, much like what I was thinking (Shift clicking to use melee and vice versa) could be done there.