Answer: Peasants' Revolt
Tensions were high in England following the Black Death and an increase in taxes to fund the Hundred Years' War, and when official John Bampton's attempt to collect unpaid taxes led to violence, it sparked revolt across the South East.
A mob, led by Wat Tyler, set fire to buildings and killed royal officials in London, leading the 14-year-old Richard II to meet their demands, which included the unfair practice of serfdom. The young king met the rebels on 13 June, speaking to them in their own English tongue, however, violence broke out and Tyler was killed. Eventually the mob was dispersed and Richard II rescinded on his promises.