The Barbarian is usually a member of one of the several tribes living on the fringes of civilization. These tribes refuse the influence of those they see as soft and weak, and the Barbarian is no different. Ceaseless clan warfare and the constant struggle to survive in the hostile wilderness are reflected in the Barbarian's sturdy and powerful frame.
Perhaps lacking the sophistication of the other characters, the Barbarian has an acute awareness of his surroundings. Because of his shamanistic believe in the animal powers with which he identifies, the Barbarian is sometimes associated with stories of lycanthropy. In fact, he believes he can call upon totemic animal spirits to infuse him with supernormal strengths and abilities, but these abilities only work to improve his already superb battle tactics.
The Barbarian is a pure fighter, and most of his skills augment these core abilities. His three skill sets Combat Skills, Combat Masteries, and Warcries. As with other characters, the skills that are developed in each area ultimately affect the abilities of the Barbarian as he progress through the Diablo II universe.
The skills in this area are great tools for the Barbarian at any time. However, many of them, like Taunt and Battle Command, really shine when used in a multiplayer team situation. Battle Command, for example, gives each party member who's close to you an extra skill point in every skill they have for a brief period of time. The first skill in this set is Howl, which forces the enemies to run away from your position. This skill is handy whether you're in the Blood Moor of Act I or in the deepest recesses of hell.
More information at Warcries
A Barbarian who's mastered the six arts (mace, axe, sword, pole arm, throwing, and spear) is a force to be reckoned with. Unfortunately, putting many points into all of the Masteries is not feasible, so the best thing to do is choose a Mastery and run with it. Oftentimes, players wait and hold onto skill points until they pick up a weapon that they like, and then put the skill points into the area that matches that weapon.
More information at Combat Masteries
This skill tree is the main attack skill tree of the Barbarian, and includes the critical skills of Bash and Leap Attack. Although the Barbarian's Masteries are very important, he'd be hard-pressed to succeed without having at least a few of the skills in the Combat skill tree.
More information at Combat Skills (Barbarian)
Directory of Barbarian Builds