I want to know the answer to the following question:
What had the Kushans conquered much of by the time of Kanishka
All the background I'm provided with is that "By the time of his grandson, Kanishka, they had conquered most of northern India, at least as far as Saketa and Pataliputra, in the middle Ganges Valley, and probably as far as the Bay of Bengal.". Is that enough to answer the question?