sentence1: Straightened out for a while, Humayun came back in 1555 with his Persian army to recapture the Punjab, Delhi, and Agra, but the next year his opium habit caused his death (see page 64).
sentence2: Straightened out for a bit, Humayun came back on 1555 with his army to recapture the provinces, but was stopped by an opium addiction.