Flag of Bangladesh white field. The flag is based on a similar flag used during the Bangladesh Liberation War of 1971, which had a yellow map of the country inside the red disc. In 1972 this map was removed from the flag. One reason given was the difficulty for rendering the map correctly on both sides of the flag. The civil ensign and naval ensign place it in the canton of a red or white field, respectively. The first version of the flag was designed and made by a section of student leaders and activists of Swadheen Bangla Nucleus on 6 June 1970,
Flag of Portugal during the Discoveries and frequently on ship sails. A green background version was a popular standard of the rebellious during the 1640 revolution that restored Portugal's independence from Spain. There are no registered sources to confirm that this was the origin of the republican colours. Another explanation gives full credit to the flag that was hoisted on the balcony of Porto's city hall during the 1891 insurrection. It consisted of a red field bearing a green disc and the inscription "Centro Democrático Federal «15 de Novembro»" (), representing one of many masonry-inspired republican clubs. Over the following 20 years, the