When US President Donald Trump launched his trade war last April, he promised a new era for America - vowing to restore manufacturing, raise money for the government and open up new markets.
One year later, tariff rates in the US stand at the highest level in decades, with the average effective rate at roughly 10% up from about 2.5% at the start of last year.
Here are four ways they have changed global trade.
Trump delivered a global shock last April on so-called Liberation Day when he unveiled a minimum 10% tariff on many foreign goods - targeting items from some countries, such as China, with far higher duties.
As China hit back with tariffs of its own, the tit-for-tat exchange sent tariff rates spiralling into the triple digits and for a few weeks brought trade between the two giants to a screeching halt.
