This period saw the ruthless power grab of Debera Borbarua and Laluksola Borphukan's abandonment of Guwahati to the hands of Mughals and oppression via Sulikphaa alias Lora Roja.

Soon after his ascension to the throne, he retook Guwahati and permanently wrested out the Mughals from Assam following the Battle of Itakhuli and established a strong rule of 'blood and iron'.

[2][3] By his lineage, character, experience and personal valour Gadapani was the most capable, among the surviving princes, to wield the authority of a sovereign, and pilot the government through hazardous adventures.

Gobar Raja was the king for only 20 days and was executed after the fall of Debera Borbarua at the hands of the forces of Atan Burhagohain.

After Laluk Sola Borphukan had Atan Burhagohain murdered in 1679, he installed Sulikphaa Lora Roja as the king and tried to become the de jure ruler of the Ahom kingdom.

Rup Konwar Jyoti Prasad Agarwala's First Assamese Film also showed Dalimi, as a daughter of Naga chieftain who had fallen for the charms of Supatphaa.

At the time of Supatphaa's accession to the throne, the Ahom kingdom was being sapped by internal dissensions, and patriotic feeling had become so weakened that many deserted to the Mughal side, who had re-occupied Gauhati, and were gradually pushing their frontier eastwards.

Before he died he had quelled all internal disputes, revived the waning national spirit, driven the Mughals beyond Manas and, by prompt punitive measures, put a stop to the raiding and restored the prestige of the Ahoms among the turbulent tribes on the frontier.

The forts at Bansbari and Kajali fell at the first assault, and a great naval victory was gained near the mouth of Bar Nadi, the whole enemy fleet falling into the hands of Ahoms.

In 1682 Supatphaa waged the Itakhulir Rann Battle of Itakhuli and captured Guwahati back from the Mughals and brought an end to the eighty years of Ahom-Mughal conflicts.

A vast amount of booty was taken in Guwahati, including gold and silver; elephants, horses, and buffaloes, cannon of all sizes and guns, swords and spears.

He married the extremely beautiful daughter of the warlike Nokpu (Ao) warrior Assiring, Sentishila, fondly renamed by him as Dalimi.

And renamed the ancient Asheimba- Yimuba gate as Assiringia Duar and granted a large piece of land amounting to many thousand bighas as Assiringia Khat (present-day Naginijan Tea estate, under Assam Tea Corporation) near Nakachari in Jorhat district of ASSAM, valuable scarves and shawls made of finest silk, steel doors, Ahom hats (Japees) gold and diamond ornaments and a muzzle-loading gun, to his father in law, Assiring, thus ensuring good matrimonial relations with the Aos, apart from his Konyak kinsman.

The following advice, which he gave to his elder son at his death-bed: "Do not appoint persons of low social ranks in high offices.

From this, it is also said that he suggested his son to reinstate all the Vaishnava Gosains and Mahantas deposed or at last, realised his own folly of making an alignment with the Sakta Brahmanas against the Vaishnava priest, whose sect has already became people's religion[9] Reverend Nathan Brown of the American Baptist Mission, referring to the opening up of the tombs of Ahom kings in Charaideo, wrote: "The tomb of King Supatphaa at Charaideo, as nearly as we could calculate without instruments, was ninety feet high, and so natural in its appearance that a stranger would scarcely have suspected it to be anything more than an ordinary hill...Thirteen of these royal tombs were dug open during my residence in Assam, and I was told in the flowery language of the country, that when King Supatphaa's tomb was opened 'the backs of three elephants were broken with the weight of the treasures it contained', meaning simply that three elephants were well loaded down."