• March 1: President Donald Trump announces tariffs on all imports of steel and aluminum, including metals from China.
• March 22: Trump announces plans to hit $50 billion worth of Chinese goods with a 25% tariff. China announces tariffs in retaliation to the steel and aluminum duties and promises a response to the latest US announcement.
• April 3: The US trade representative announces a list of Chinese goods subject to the tariffs. There is a mandatory 60-day comment period for industries to ask for exemptions from the tariffs.
• April 4: China rolls out a list of more than 100 US goods worth roughly $50 billion that are subject to retaliatory tariffs.
• May 19: After a meeting, the two countries announce the outline of a trade deal to avoid the tariffs.
• May 29: The White House announces that the tariffs on $50 billion of Chinese goods will move forward, with the final list of goods released June 15. The move appears to wreck the nascent trade deal.
• June 15: Trump rolls out the final list of goods subject to new tariffs. Chinese imports worth $34 billion would be subject to the new 25% tariff as of July 6, with another $16 billion worth of imports subject to the tariff at a later date. China retaliates with an equivalent set of tariffs.
• June 18: Trump threatens a 10% tariff on another $200 billion worth of Chinese goods.
• July 6: The first tranche of tariffs on $34 billion worth of Chinese goods takes effect; China responds in kind.
• July 10: The US releases an initial list of an additional $200 billion worth of Chinese goods that could be subject to a 10% tariff.
• August 1: Washington more than doubles the value of its tariff threats against Beijing, announcing plans to increase the size of proposed duties on $200 billion worth of Chinese goods to 25% from 10%.

Source: Business Insider