Mughal emperor Hamayun

Was 23 years old when he succeeded to thrown

As inherited kingdom was not fully in his control so he faced resistance from Afghan and Rajputs. 

On father's Will he divided empire among three brothers Kamran, Askari Mirza and Hindal

When Humayun needs support to fight ambitious Afghan (Sher Shah Suri), his brothers sided with his enemies

As a result he lost his empire.

Sher Shah Suri posed a challenge to Mughal power by taking control of Behar and the rich province of Bengal 

This led to the battle of Kanauj in 1540 which decided the fate of Mughal Empire 

Humayun was defeated and fled to Persia and took refuge with Shah Tahmasp 

Sher Shah Suri declared himself emperor of Hindustan and successfully put down all opposition during his rule

For next fifteen years , Humayun remained a fugitive 

He decided to go to Kashmir but his brother blocked his way.

So he fled towards Sindh and took shelter with the Raja of Umerkot

He then presented Koh-e-Nur to the Shah of Persia in retiurn for the refuge of himself and his family

Finally with Shah Tahmasp's help, he recaptured Punjab, Delhi and Agra and ascended the thrown of hindustan

He was not a military genius like his father 

But was interested in astronomy, Astrology, painting and poetry.

He was kind and generous whose kindness was exploited by his enemies.

He brought Persian culture in sub-continent.