Flag of the Delhi Sultanate of 1206-1352
The Delhi Sultanate (1206–1526) was an Islamic dynasty established by the Governor of Delhi in 1206 after the Ghor dynasty of Afghanistan (1148–1215) who occupied and conquered the Indus and Gangetic plains north of the Narmada River after 1175. The first dynasty, the Kutbshahi dynasty, was founded by Turkic-speaking slaves who remained in the Indus and Gangetic plains by the Ghur dynasty, hence the name "slave dynasty". The subsequent dynasties were: Karji, Tugluk, Saeed and Lodi, and because their capital was always in Delhi, they were collectively known as the Delhi Sultanate.
Flag of the Sultanate of Bengal 1352-1576
The Sultanate of Bengal refers to the semi-independent dynasty in Bengal in the Middle Ages. The first was Sultan Fahruddin Mubarak Shah, who became an independent and self-proclaimed sultan from the Delhi Sultanate in 1338; For the next three centuries, the sultanate was ruled by rulers from Turkic, Bengal, Arab, Ethiopian, and Afghan rulers. The Sultanate was annexed by the Mughal Empire in 1576.
Flag of the Mughal Empire 1576-1858
莫卧儿帝国（乌尔都语：مغلیہ سلطنت，转写：Mughliyah Saltanat，波斯语：مغلیہ سلطنت，1526年—1858年），是巴布尔自阿富汗南下入侵印度建立的征服王朝。 "Mughal" is a transliteration of the word "Mongol" in Persian, because the ruler was a Persian-Turkic Mongol Timurid dynasty with Chagatai Khanate aristocratic blood. In the heyday of the empire, the territory encompassed almost the entire Indian subcontinent, as well as Afghanistan and other places in Central Asia. The imperial government consisted of Muslims who believed in Islam.
Flag of Suba Province, Bengal, in the 18th century
Bengal Suba (Persian: صوبه بنگال, Bengal: সুবাহ বাংলা, English: Bengal Subah) was a province of the Mughal Empire in the 16th–18th centuries, covering most of Bangladesh and present-day West Bengal. Established after the collapse of the Sultanate of Bangladesh, the world's main Islamic trading nation, Suba is the richest and most developed place in the Muslim world, and its economy is showing signs of primitive industrialization. The Mughals played an important role in the development of modern Bengali culture and society.
1858-1885 Union Jack
In 1858, Bengal, along with all of India, became a complete British colony, using the British flag.
Flag of the Viceroy of India 1885-1880
Flag of British India 1880-1947
Flag of the Bengal District 1699-1947.
Bengal Presidency, officially known as Presidency of Fort William and Bengal Province, is a region of British India. Its jurisdiction is roughly northwestern of the Indian subcontinent. Penang and Singapore were also administratively part of the jurisdiction until they formed the Straits Settlements in 1867. Bengal jurisdiction began in 1765 with a treaty between the British East India Company and the Mughal Emperor and the Austro-German Administrator that placed Bengal, Bihar and Orissa under the jurisdiction of the Company. The jurisdiction includes all British territories north of the Central Province, from the mouth of the Ganges and Brahmaputra to the Himalayas and the Punjab.
Flag of Pakistan 1947-1971
After the partition of India and Pakistan in 1947 and the independence of Pakistan, Bangladesh became part of Pakistan, commonly known as East Pakistan.
Mukti Bahini flag
Mukti Bahini (Bengali: মুক্তিবাহিনী,[3] translated as freedom fighters or liberation army) was a guerrilla resistance movement consisting of Bengali troops, paramilitaries and civilians during the Bengal Liberation War, which transformed East Pakistan into Bangladesh in 1971.
Flag of Bangladesh 1971-1972
The original flag with a map of Bangladesh was designed by the country's painter Quamrul Hassan and was first raised at Dhaka University on March 3, 1971. On 23 March 1971, the flag was raised for the first time in front of the residence of President Zia Rahman. The pattern was later removed from the flag because the Bangladeshi map in the original flag was reminiscent of the unpleasant division of East and West Pakistan, and because the map was reversed from the reverse side.
Flag of Bangladesh since 1972
The flag of Bangladesh was officially adopted on 27 January 1972 with a 3:5 aspect ratio. The flag is based on the flag used in the 1971 Bangladesh Liberation War, and the original flag is a map of Bangladesh under the red sun. For the visual effect when flying, the red circle is slightly offset towards the flagpole, the radius is one-fifth of the length of the flag, and the center of the circle is at the junction of the flag 9/20 and the median horizontal line. It represents the rising sun in Bangladesh and the blood of the martyrs who died for the independence of Bangladesh. The background color green represents the rich land of Bangladesh.