This package contains the "an orcish incursion" campaign for wesnoth: "defend the forests of the elves against the first orcs to reach the great continent, learning valuable tactics as you do so." (novice level, 7 scenarios.)
battle for control of villages, using variety of units which have advantages and disadvantages in different types of terrains and against different types of attacks. units gain experience and advance levels, and are carried over from one scenario to the next in a campaign.