Other than the military tactics and battle plans that were already shown in WOW and its expansions, or in the novels or shot stories, what kind of tactics could you see the various races or factions of Warcraft use in battle to get the edge on their foes or reduce their casualties or reinforce their defenses or all of these at the same time ?
No need to say that some races like Trolls, Worgens and Elves, especially the Night Elves would be very good at guerilla using their natural agility and speed, as well as their knowledge of the lands, and in the Kaldorei's case their ability to become invisible with their ability to meld into shadows to observe enemies without being seen, ambushing the enemies or taking them by surprise and then retreat before the foes can properly react and incite the foes to try to pursue them only to be better isolated or trapped in a hostile environment. The Trolls already used this tactic a lot in the lore against the Aqir and the Horde during the First War but it's never shown and used in novels or the games.
The Centaurs would be also be very good at using the hit and run tactic frequently used by parthians, mongols and other nomadic tribes or civilizations using horses of harrassing the enemies by circling them, raining arrows on them, faking retreat to lure the enemy out of its defensive positions and then reraining arrows while staying out of reach. Centaurs' shamans and druids would also have an interest into specializing in long-range elemental attacks and spells.