President Donald Trump announced tariffs of 25% on goods from Japan and South Korea beginning on Aug. 1, as he moved to impose unilateral rates on countries that have not yet secured trade deals with his administration.

The president has already threatened an additional 10% tariff on goods from countries aligning themselves with a bloc of nations that includes China and Russia.

The tariffs on some of America’s closest allies would go into effect Aug. 1, unless the countries reach some kind of trade agreement with the United States.