Short answers, pulled from the story.
Ahmad Shah Bahadur was the fourteenth Mughal emperor, reigning from 1748 to 1754. He was born on the 23rd of December 1725 to Emperor Muhammad Shah and his consort Qudsia Begum, and was crowned at the Red Fort in Delhi on the 28th of April 1748 at the age of twenty-two.
Ahmad Shah Bahadur was deposed in 1754 by his own appointed minister Imad-ul-Mulk, who allied with Maratha forces under Raghunathrao. After defeating the emperor at the Battle of Sikandarabad, Imad-ul-Mulk imprisoned Ahmad Shah and later had him blinded, claiming to have intercepted secret letters in which the emperor encouraged the Jat rebel Suraj Mal to continue fighting.
At the Battle of Manupur in 1748, fought near Sirhind by the river Sutlej, Prince Ahmad led a Mughal army of seventy-five thousand against roughly twelve thousand Durrani troops. He was nominally victorious after a Durrani wagon filled with gunpowder exploded, and was awarded the honorific Bahadur. The Grand Vizier Qamar-ud-Din Khan was killed in the battle by a stray artillery shell.
Ahmad Shah Bahadur lost Punjab, Multan, Sindh, and Kashmir to Ahmad Shah Abdali under a treaty signed in 1752, which ceded those territories to Afghan administration. Gujarat fell to the Maratha Empire in 1753, and Orissa was annexed by Raghoji I Bhonsle in 1751 after Alivardi Khan's nearly eleven years of resistance.
Imad-ul-Mulk was Ghazi ud-Din Khan Feroze Jung III, son of the deceased Mughal general Intizam-ud-Daula. Ahmad Shah Bahadur appointed him in May 1753 at age eighteen to counter the Grand Vizier Safdarjung. He emerged as regent after Safdarjung's defeat, then turned against the emperor when Ahmad Shah tried to reinstate Safdarjung after Imad-ul-Mulk collected one million five hundred thousand dams but refused to pay the army.
Ahmad Shah Bahadur was imprisoned at the Salimgarh Fort following his deposition in 1754. He died there on the 1st of January 1775 at the age of forty-nine, during the reign of Emperor Shah Alam II. His tomb is located in a burial enclosure joined to the Moti Masjid in Mehrauli.