At 6.30 p.m. on Thursday 16 December 1773, a group of between 100 and 150 Americans raided three East India Company merchantmen moored in Boston and threw 92,000lb of tea (worth $1.7 million in today’s terms) into the harbour. A central part of the American founding story, the 250th anniversary of the Boston Tea Party is being commemorated this month as a key moment when patriotic Americans fought back against the greedy British and their oppressive taxation policies that forced up prices on commodities such as tea, which in turn led to the American Revolution.