Final answer:
The annual event in question is the Sturgis Motorcycle Rally, however, the historical context provided pertains to the Zoot Suit Riots, which were a series of racially motivated attacks against Mexican American youths by servicemen in Los Angeles during 1943.
Step-by-step explanation:
The annual Sturgis Motorcycle Rally is a biker tradition that arose from the Hollister, California incident in 1947. This motorcycle event is one of the largest in the world and draws participants from all over. While the question speaks to motorcycle culture, the historical reference provided as context pertains to the Zoot Suit Riots, which occurred in Los Angeles in 1943, a few years prior to the Hollister incident. The Zoot Suit Riots were characterized by a series of violent clashes between white military servicemen and Mexican American youths. The media coverage at the time was heavily biased, often portraying the Mexican American community in a negative light and omitting the fact that servicemen were instigating violence. This important historical event shows examples of racism and sensational journalism, which have shaped experiences and cultural traditions, extending influence beyond those directly involved.