||Basic Leadership: increases your hero's troops' morale by 1.
||Advanced Leadership: increases your hero's troops' morale by 2.
||Expert Leadership: increases your hero's troops' morale by 3.
Leadership is a secondary skill, that increases the morale of creatures in hero's army.
Death Knights and Necromancers cannot learn Leadership.
Heroes with Leadership as a starting skill:
Chance to get
Out of total 112 for Shadow of Death, and of (112 + Interference chance) for Horn of the Abyss .
Banned skills change the probability.
Whether to use Leadership or not, depends of a map. If it is fully dedicated to one faction (Tower, Inferno, Stronghold), or if there is only one player on it, Leadership isn't the most important skill, as in most cases, you'll have positive morale, because all your troops are from the same town. On a map with many types of towns it works, especially when you capture a Necropolis and summon undead who decrease morale (pity that Leadership is completely unavailable for Necropolis heroes, therefore summoned troops from other towns will have bad morale - unless a Death Knight or Necromancer gets Leadership on the map, e.g. in a Witch Hut; and during a siege, Tavern will help even in Necropolis). Aside from Necropolis, the town for which Leadership is least important is Conflux as Elementals are immune to morale.
Things that ruin Leadership