who was the king of macedonia who built an empire that stretched to india
Alexander the Great
Introduction
PhilipII's son Alexander the Great, leading a federation of Greek states, accomplished his father's objective of commanding the whole of Greece when he destroyed Thebes after the city revolted. 
Alexander the Great. Alexander III Alexander the Great
Macedonia (ancient kingdom) Alexander the Great Macedonia (ancient kingdom)
Introduction Introduction Introduction
PhilipII's son Alexander the Great, leading a federation of Greek states, accomplished his father's objective of commanding the whole of Greece when he destroyed Thebes after the city revolted. During Alexander's subsequent campaign of conquest, he overthrew the Achaemenid Empire and conquered territory that stretched as far as the Indus River. Alexander III  Before the 4th century BC, Macedonia was a small kingdom outside of the area dominated by the great city-states of Athens, Sparta and Thebes, and briefly subordinate to Achaemenid Persia. During the reign of the Argead king PhilipII (359–336 BC), Macedonia subdued mainland Greece and the Thracian Odrysian kingdom through conquest and diplomacy. With a reformed army containing phalanxes wielding the "sarissa" pike, PhilipII defeated the old powers of Athens and Thebes in the Battle of Chaeronea in 338BC. PhilipII's son Alexander the Great, leading a federation of Greek states, accomplished his father's objective of commanding the whole of 
wiki:11546231
Macedonia (ancient kingdom) [SEP] Introduction
During the reign of the Argead king PhilipII (359–336 BC), Macedonia subdued mainland Greece and the Thracian Odrysian kingdom through conquest and diplomacy. With a reformed army containing phalanxes wielding the "sarissa" pike, PhilipII defeated the old powers of Athens and Thebes in the Battle of Chaeronea in 338BC. PhilipII's son Alexander the Great, leading a federation of Greek states, accomplished his father's objective of commanding the whole of Greece when he destroyed Thebes after the city revolted. During Alexander's subsequent campaign of conquest, he overthrew the Achaemenid Empire and conquered territory that stretched as far as the Indus River.