During the Vietnam War, the National Liberation Front of South Vietnam, also known as the Viet Cong, used a flag with a red and blue background and a central yellow star. The red symbolized the ...

The Romanian and Chad national flags are nearly identical in design and size, with little differences in colour between the ...

The blue, yellow, black, green, and red rings combined with the white background were meant to represent the colors of the flags of every country at the time. Blue and yellow made up Sweden.