Amina Begum was the youngest daughter of Alivardi Khan and Princess Sharfunnisa, the paternal aunt of Mir Jafar.

His father, Mirza Muhammad Hashim was the youngest son of Haji Ahmad, the elder brother of Alivardi Khan.

Firstly, that they strengthened the fortification around the Fort William without any intimation or approval; secondly, that they grossly abused trade privileges granted them by the Mughal rulers – which caused heavy loss of customs duties for the government; and thirdly, that they gave shelter to some of his officers, for example, Krishnadas, son of Rajballav, who fled Dhaka after misappropriating government funds.

Hence, when the East India Company began further enhancement of military strength at Fort William in Calcutta, Siraj ud-Daulah ordered them to stop.

The Company did not heed his directives; consequently, Siraj retaliated and captured Calcutta (for a short while renamed Alinagar) from the British in June 1756.

[11] Sir William Meredith, during the Parliamentary inquiry into Robert Clive's actions in India, vindicated Siraj ud-Daulah of any charge surrounding the Black Hole incident: "A peace was however agreed upon with Surajah Dowlah; and the persons who went as ambassadors to confirm that peace formed the conspiracy, by which he was deprived of his kingdom and his life.

[citation needed] It and other imambaras built in towns such as the trading hub Hoogly attracted Shia scholars from within and outside India.

As a result, Siraj started secret negotiations with Jean Law, chief of the French factory at Cossimbazar, and de Bussy.

The Nawab also moved a large division of his army under Rai Durlabh to Plassey, on the island of Cossimbazar 30 miles (48 km) south of Murshidabad.

[19][20][21][22] Mir Jafar and the Seths desired that the confederacy between the British and himself be kept secret from Omichund, but when he found out about it, he threatened to betray the conspiracy if his share was not increased to three million rupees (£300,000).

[23] Both treaties and separate articles for donations to the army, navy squadron and committee were signed by Mir Jafar on 4 June.

[24][25][26][27] Lord Clive testified and defended himself thus before the House of Commons of Parliament on 10 May 1773, during the Parliamentary inquiry into his conduct in India: "Omichund, his confidential servant, as he thought, told his master of an agreement made between the English and Monsieur Duprée [may be a mistranscription of Dupleix] to attack him, and received for that advice a sum of not less than four lacks of rupees.

When all things were prepared, and the evening of the event was appointed, Omichund informed Mr Watts, who was at the court of the nawab, that he insisted upon thirty lacks of rupees, and five per cent.

upon all the treasure that should be found; that, unless that was immediately complied with, he would disclose the whole to the nawab; and that Mr. Watts, and the two other English gentlemen then at the court, should be cut off before the morning.

The event took place, and success attended it; and the House, I am fully persuaded, will agree with me, that, when the very existence of the company was at stake, and the lives of these people so precariously situated, and so certain of being destroyed, it was a matter of true policy and of justice to deceive so great a villain.

"[28][29] The Battle of Plassey (or Palashi) is widely considered the turning point in the history of the subcontinent, marking the start of British rule in India.

Betrayed by a conspiracy plotted by Jagat Seth, Mir Jafar, Krishna Chandra, Omichund, etc., Siraj lost the battle and had to escape.

He ordered his principal commanders to engage their troops for his safety, but as he was bereft of power due to the loss at Plassey, they were reluctant to offer unquestioning support.

Then, with his principal consort Lutf-un-Nisa and very few attendants, Siraj began his escape towards Patna by boat, but was eventually arrested by Mir Jafar's soldiers.

In 1985, Sarkar wrote:[32] After the death of Alivardii Khan, his immature grandson became the nawab of Bengal, taking the name Miirza Mohammed Siraj-Ud-Daola.