Build up a great army, gradually turning raw recruits into hardened
veterans.
In later games, recall your toughest warriors and form a deadly host that
no one can stand against! Choose units from a large pool of specialists,
and hand-pick a force with the right strengths to fight well on different
terrains against all manner of opposition.

Wesnoth has many different sagas waiting to be played.
Fight to regain the throne of Wesnoth, of which you are the legitimate
heir... lead a brutal quest to unite the orcish tribes... vanquish a horde
of undead warriors... Guide a band of elvish survivors in an epic quest to
find a new home...

There are at least two hundred unit types, sixteen races, six major
factions, and hundreds of years of history.
The world of Wesnoth is absolutely huge and only limited by your
creativity.
You can also challenge up to eight friends — or strangers — and fight in
epic multiplayer fantasy battles.