The kingdom of Malwa or Avanti. Further east, the kingdomof Chedi lie in Bundelkhand. Chandragupta Maurya unitednorthern India c. 320 BCE, establishing the Maurya empire (321 to 185 BCE), which included allof modern-day Madhya Pradesh. King Ashoka's wife was said to come fromvidisha- a townnorth of today's Bhopal. The Maurya empire went into decline after the death of Asoka, and Central India was contestedamong the Sakas, Kushanas,and local dynasties during the 3rd to 1st centuries BCE. Ujjain emerged as thepredominant commercial center of western India from the first century BCE,located on the trade routes between the Ganges plain andIndia's Arabian Sea ports. Itwas also an important Hinduand Buddhist center.