On 17 April 1816, at least 14 Dharawal men, women and children died in the Appin Massacre in the former colony of New South Wales. The killings, ordered by the then Governor of New South Wales, Lachlan Macquarie, were perpetrated by the military against Aboriginal people in reprisal for disputes between colonists and First Peoples whose lands and resources colonists plundered.

Residents of the Campbelltown area, on the edge of Sydney, New South Wales, Australia were asked to reflect on the Appin Massacre when two memorial events were announced on 3 April 2020 before the coronavirus pandemic interrupted large gatherings of people:

An annual memorial service at Cataract Dam near the site of the massacre was to be held on 14 April 2020, followed by a flag raising memorial ceremony on 17 April 2020 in the forecourt of the Campbelltown City Council building.

Owing to the coronavirus pandemic, the Appin Massacre Memorial services advertised for 14 and 17 April 2020 were replaced by an online event on 17 April 2020. On 16 April 2020, Campbelltown residents were asked to join a streamed flag raising ceremony.

The Campbelltown City Council uploaded a video of the Appin Massacre memorial service on 18 April 2020: