<P> In Argentina, a march was planned in Buenos Aires . </P> <Table> External video <Tr> <Td_colspan="2"> March For Our Lives Rally, Washington, D.C., March 24, 2018, C - SPAN </Td> </Tr> </Table> <Tr> <Td_colspan="2"> March For Our Lives Rally, Washington, D.C., March 24, 2018, C - SPAN </Td> </Tr> <P> March for Our Lives was among the biggest youth - led protests since the Vietnam War era . Estimates of participation at the main event in Washington, D.C., range from 200,000 to 800,000 . </P>

Where was the march for our lives held