It seems like you might be referring to the "Sharpeville Massacre," an important historical event in South Africa that took place on March 21, 1960. During this event, police opened fire on a peaceful protest against apartheid pass laws, resulting in the deaths of 69 people and injuring many others. The incident drew international condemnation and highlighted the brutality of apartheid, leading to increased global awareness and opposition to the regime.
If you meant something else by "Sharpville Alassance," please clarify, and I'd be happy to help!