Bangladesh (বাংলাদেশ, lit. "The country of Bengal"), officially the People's Republic of Bangladesh (গণপ্রজাতন্ত্রী বাংলাদেশ ), is a sovereign country in South Asia. It shares land borders with India and Myanmar (Burma). The country's maritime territory in the Bay of Bengal is roughly equal to the size of its land area. Bangladesh is the world's eighth most populous country as well as its most densely-populated, to the exclusion of small island nations and city-states. Dhaka is its capital and largest city, followed by Chittagong, which has the country's largest port. Bangladesh forms the largest and easternmost part of the Bengal region. Bangladeshis include people from a range of ethnic groups and religions. Bengalis, who speak the official Bengali language, make up 98% of the population. The politically dominant Bengali Muslims make the nation the world's third largest Muslim-majority country. Islam is the official religion of Bangladesh.
Most of Bangladesh is covered by the Bengal delta, the largest delta on Earth. The country has 700 rivers and 8,046 km of inland waterways. Highlands with evergreen forests are found in the northeastern and southeastern regions of the country. Bangladesh has many islands and a coral reef. The longest unbroken natural sea beach of the world, Cox's Bazar Beach, is located in the southeast. It is home to the Sundarbans, the largest mangrove forest in the world. The country's biodiversity includes a vast array of plant and wildlife, including endangered Bengal tigers, the national animal.
India (ISO: ), also known as the Republic of India (ISO: ), is a country in South Asia. It is the seventh largest country by area and with more than 1.3 billion people, it is the second most populous country as well as the most populous democracy in the world. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land borders with Pakistan to the west; China, Nepal, and Bhutan to the northeast; and Bangladesh and Myanmar to the east. In the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives, while its Andaman and Nicobar Islands share a maritime border with Thailand and Indonesia.
The Indian subcontinent was home to the urban Indus Valley Civilisation of the 3rd millennium. In the following millennium, the oldest scriptures associated with Hinduism began to be composed. Social stratification, based on caste, emerged in the first millennium BCE, and Buddhism and Jainism arose. Early political consolidations took place under the Maurya and Gupta empires; later peninsular Middle Kingdoms influenced cultures as far as Southeast Asia. In the medieval era, Judaism, Zoroastrianism, Christianity, and Islam arrived, and Sikhism emerged, all adding to the region's diverse culture. Much of the north fell to the Delhi Sultanate; the south was united under the Vijayanagara Empire. The economy expanded in the 17th century in the Mughal Empire. In the mid-18th century, the subcontinent came under British East India Company rule, and in the mid-19th under British Crown rule. A nationalist movement emerged in the late 19th century, which later, under Mahatma Gandhi, was noted for nonviolent resistance and led to India's independence in 1947.