Harley-Davidson's announcement surprised US President Donald Trump, who claimed that the manufacturer used the tariffs as an excuse.
The European Union, in turn, warned that that the company's move to transfer its production to Europe was a direct consequence of the US protectionist trade policy.
"We don't want to punish, but that is the unfortunate consequence, that [US companies] will put pressure on the American administration to say hey, hold on a minute, this is not good for the American economy," EU Trade Commissioner Cecilia Malmstrom said.
READ MORE: 'Trade Must Be Fair': Trump Calls on All Countries to Remove Existing Tariffs
A real threat of the trade war appeared on the horizon when the United States in March imposed a 25 percent tariff on steel imports and a 10 percent tariff on aluminum imports. Though the tariffs on Canada, Mexico and the European Union, as well as several other states, were initially suspended, on May 31, Washington had removed the exemption.