The modern state of Hindustan was created only 10 years ago, in 1857, but the Gurkani dynasty has ruled since 1526, when an ambitious Central Asian refugee and poet-prince, Zahiruddin Babur, a descendant of Tamerlane and Genghis Khan, defeated the Delhi Sultanate in the First Battle of Panipat.
His son, Humayun, nearly lost the empire when an Afghan Subadar named Sher Shah Suri took over the capital and created the Sur Empire.
But Sher Shah and his son did not live long,and after his (and his successor's) death Humayun returned to Hindustan, reclaiming his birthright.
His son, Akbar, also had to tackle with rebels in the form of a Hindu Raja named Hemu, also known as Vikramaditya. He tried to take Delhi but Emperor Akbar met with success at the Third Battle of Panipat.
As Akbar's sons Daniyal and Murad feared that he would give the throne to Jahangir, they began a battle for the throne between the sons. Thanks to overall support and the wiles of Jahangir's consort, Nurjahan, Jahangir won the throne. Under Jahangir, the English East India Company was allowed to trade with the Empire.
His son, Shah Jahan, is famous for having built the Taj Mahal, in honour of his devotion to his deceased wife, Mumtaz Mahal.
Shah Jahan, however, was locked up by his son Aurangzeb when he defeated his brother Dara Shikoh in the battle for the throne.
Aurangzeb was a very pious man, who brought back the hated Jizya tax that non-Muslims had to pay, and soon enough rebellions were brewing thanks to the efforts of Hindu and Sikh kings. Aurangzeb also killed the Sikh Gurus Tegh Bahadur and Guru Gobindh Singh,as well as the Sikh warrior Banda Singh Bahadur.
His later succesor Muhammad Shah 'Rangila' may have been less pious than Aurangzeb, but he was no lion on the battlefield and thus Nadir Shah of Persia could easily take Delhi.
Now the Mughals were weak and thus were forced a pension by the British.
This continued until the reign of Bahadur Shah II, a mellow, soft-spoken poet who was chosen by the rebel Sepoys to be the emperor of Hindustan, in the Indian War of Independence, just ten years ago.
After the war, some of the Muslim-majority territories were sympathetic towards the idea of the Mughal Emperor being their leader, thus crowned him as emperor
Bahadur Shah II died a year after the war of malaria in the Shah Mahal in Lahore.
Sindh- A very close secret ally of Hindustan, Sindh believes that they are both Muslim allies and partners, those that last a lifetime.
Awadh-Awadh has been an ally since the war and Hindustan believes that it is its elder brother.
Bengal-Hindustan claims it to be a useful and good ally.
Most nations other than those mentioned.
Gujarat- This is because it is the official overlord of Sindh.