A map titled Aśoka's Expansion of Mauryan Empire. A key shows Chandragupta's empire in purple and Aśoka's empire in green. The purple area begins in Afghanistan and includes Pakistan and a northern portion of the Indian subcontinent. The green area includes most of the Indian subcontinent. How did the boundaries of the Mauryan Empire change under Aśoka? The empire expanded to the south. The empire expanded to the west. The empire expanded to the north. The empire shrank to a smaller size.