The Bengal Sultan after 1534 allowed the Portuguese to create several settlements at Chitagoong, Satgaon, Hughli, Bandel, and Dhaka. In 1535, the Portuguese allied with the Bengal sultan and held the Teliagarhi pass  from Patna helping to avoid the invasion by the Mughals. By then several of the products came from Patna and the Portuguese send in traders, establishing a factory there since 1580.