Independent Tuvalu
Who & why: following the 1975 separation from the Gilbert Islands, the Ellice Islands complete the process on 1 October 1978, becoming the fully independent nation of Tuvalu within the Commonwealth. The new state keeps the queen as head of state under a parliamentary system, and joins the United Nations in 2000, one of the smallest sovereign nations on earth by both population and land area.
What it represents: a light blue field carries the Union Jack in the canton, marking continued Commonwealth membership, while nine yellow five-pointed stars scattered across the fly are set out in the actual geographic layout of Tuvalu's nine home islands — a literal map worked into the design itself.