The Gupta Empire made some physical gains and this increased their authority. Firstly, the centre of their activities was Central India which included Bihar and Uttar Pradesh. This was a very fertile region. Secondly, they were able to use the iron ore found in the Madhya Pradesh and Bihar.
Thirdly, since their region was close to the Silk Route, they got many benefits. All these helped the Gupta Dynasty to establish their reign over Magadha, Ayodhya (Saketham), Prayag (Allahabad), and the Plains of Central Ganges. Gradually their kingdom became an all-India Empire.
