The cable, sent this week to US diplomatic posts around the world, instructed diplomats to announce the coalition and “ask for partner participation” by Friday.
It also told diplomats not to discuss the initiative with “US adversaries, including Russia, China, Belarus, and Cuba.”
According to the cable, which was first reported by the Wall Street Journal, the coalition will be led by the State and Defense Departments through US Central Command.
“The MFC will take steps to ensure safe passage, including providing real-time information, safety guidance, and coordination to ensure vessels can transit these waters securely,” the cable said.
President Donald Trump has on several occasions criticized NATO allies and European countries for not doing enough to help the United States reopen and secure the Strait of Hormuz which has been effectively closed after the Iran war.
US blockade
The US initiative comes as Washington has imposed a naval blockade on Iranian ports since April 13, sharply reducing Iran’s oil exports and intensifying pressure on Tehran’s access to maritime trade routes.
Iranian crude shipments that successfully moved out of the Gulf of Oman fell to about four million barrels between April 13 and April 25, Reuters reported, citing oil analytics firm Vortexa.
That was down more than 80% from a comparable period in March, when Iran exported 23.4 million barrels, according to LSEG data cited by Reuters.
Reuters said only a handful of tankers carrying Iranian crude left the Gulf of Oman during that period.
Some Iranian vessels have turned off tracking systems, while US forces have turned back Iranian tankers, making it impossible to determine how much crude Iran is still delivering to customers, particularly China.