While the origin and fate of the original shield were not described in the original comics from the 1940s, the shield's fate was revealed decades later in 2001 through a retconned story. According to the tale, King T'Chaka of Wakanda met Captain America in early 1941 and gave him a sample of vibranium, an alien metal with unique vibration-absorption properties and found only in Wakanda and the Savage Land. The vibranium was used to make Captain America's circular shield, and his triangular one was retired.