Complex sentence: The pay of the troops was in arrears, and they maintained themselves by plundering the cultivators, while at the same time commenced the raids of the Pindaris, who became so bold that in 1811 they advanced to Nagpur and burnt the suburbs.
Split into simpler sentences: The pay of the troops was in arrears, and they maintained themselves by plundering the cultivators. At the same time the raids of the Pindaris commenced, who became so bold that in 1811 they advanced to Nagpur and burnt the suburbs.