Iran's armed forces warned Gulf countries against assisting the U.S. US President Donald Trump said Wednesday he was launching a major new campaign to target Iran's economy, threatening "tremendous" punishment on any country that helps or does business with the Islamic republic. Key points and original sources are listed below.

• Iran's armed forces warned Gulf countries against assisting the U.S. military on August 19, hours after the UAE announced it was severing economic ties with Tehran following new attacks on shippingS1

• US President Donald Trump said Wednesday he was launching a major new campaign to target Iran's economy, threatening "tremendous" punishment on any country that helps or does business with the Islamic republic. The intensified economic pressure campaign comes...S2