how was the movement that led to the independence of bangladesh similar to the movement that led to the formation of pakistan

Both movements were based on formation of countries that are Muslim, and they were done in a military manner with violent clashes.

Explanation:

Pakistan and Bangladesh have traditionally been part of India for thousands of years. This changed when the British Empire granted independence to its South Asian colony and instead of keeping it whole it divided it, initially in two parts, later it turned out to be three. This happened both because of what was thought to be the best for the stability of the region, but also because of propaganda and movements from the Islamic world.

Unlike India, Pakistan and Bangladesh were predominantly Muslim, so in order to avoid internal conflict the British decided to partition India in accordance to religion. While this seemed that it would contribute to avoiding problems and conflicts it turned out to be the opposite.

The Indians were not happy with this and acted aggressively to the loss of territory. The Islamic movements in Pakistan and later in Bangladesh also acted aggressively. This led to large scale conflict, with millions of people ending up dead or homeless, and there was a large scale persecution based on religion.