Heroes timeline.

The question is not quite phrased correctly. If you're interested in the chronological order of the games, it's obvious:
1) King’s Bounty: The Conqueror's Quest
2) Hammer of the Gods (although few people know about this game)
3) Heroes of Might & Magic: A Strategic Quest
4) Heroes of Might & Magic II: The Succession Wars
+ Heroes of Might & Magic II: The Price of Loyalty
5) Heroes of Might & Magic III: The Restoration of Erathia
+ Heroes of Might & Magic III: Armageddon’s Blade
+ Heroes of Might & Magic III: The Shadow of Death
6) Heroes Chronicles:
– Warlords of the Wasteland
– Conquest of the Underworld
– Master of the Elements
– Clash of the Dragons
– The Fiery Moon
– The World Tree
– Revolt of the Beastmasters
– The Sword of Frost
7) Heroes of Might & Magic IV
+ Heroes of Might & Magic IV: The Gathering Storm
+ Heroes of Might & Magic IV: Winds of War
8) Heroes of Might & Magic V
+ Heroes of Might & Magic V: Hammers of Fate
+ Heroes of Might & Magic V: Tribes of the East

Or are you interested in the chronological order of events within these games?