The historic event associated with the city of Hiroshima is the dropping of the first atomic bomb on August 6, 1945, during World War II. This event marked a devastating moment in history, leading to immense destruction and loss of life. The aftermath of the bombing resulted in a significant humanitarian crisis and has had lasting impacts on global politics and nuclear disarmament discussions. Hiroshima's transformation into a symbol of peace can be seen today through memorials and the annual Peace Memorial Ceremony held to advocate for world peace.