Captain America is one of the most iconic comic book characters in the world. A huge portion of Marvel's success can be attributed to the Sentinel of Liberty's escapades as an Avenger and an inspiring hero. To some extent, Captain America and the Marvel brand have become synonymous with one another. Captain America is a symbol of heroism and hope, and that's reflected in his shield. Those who wield the classic frisbee-like weapon should uphold the same ideologies as Steve Rogers.
Source：https://www.cbr.com/captain-america-shield-trivia/
