The UAE announced a comprehensive, indefinite trade embargo against Iran on August 19 in response to Iranian missile attacks. This move is strategically significant because UAE—particularly Dubai—has quietly become Iran's largest trade partner (accounting for ~1/3 of Iran's imports) and a key financial hub for circumventing international sanctions. US officials assess the UAE embargo will damage Iran's economy more severely than direct American sanctions, signaling potential economic isolation if other Gulf states follow suit.