Heroes of Might and Magic (I-IV)

From the introduction:

Welcome to the world of Might and Magic! Adventure awaits, as this Jump places you in the position of one of the Heroes that lead troops to battle, conquer cities, and uncover new lands and untold treasures for glory and power. Starting from humble beginnings, you will gather a host of creatures of all shapes and sizes. Do not worry for their possible inexperience: Heroes are trained in all sort of skills that allow them to make their soldiers excel in Might, while the Hero's spells allow them to harness the power of Magic (explaining the title).