President Donald Trump said Tuesday that the United States Navy will escort commercial oil tankers through the Strait of Hormuz if needed during the ongoing conflict with Iran, and ordered Washington to provide insurance guarantees to help keep Gulf shipping moving amid heightened risk.

"If necessary, the United States Navy will begin escorting tankers through the Strait of Hormuz, as soon as possible. No matter what, the United States will ensure the FREE FLOW of ENERGY to the WORLD," Trump said on his Truth Social platform.

The Strait of Hormuz is the narrow mouth of the Persian Gulf through which about a fifth of the world's oil passes. Tankers traveling through the strait, which is bordered in the north by Iran, carry oil and gas from Saudi Arabia, Kuwait, Iraq, Qatar, Bahrain, the UAE and Iran. Most of that oil goes to Asia.

Any disruption to traffic through the Strait of Hormuz is highly disruptive to the oil trade.

It connects the Persian Gulf to the Gulf of Oman. From there, ships can then travel to the rest of the world. While Iran and Oman have their territorial waters in the strait, it's viewed as an international waterway all ships can ply. The United Arab Emirates, home to the skyscraper-studded city of Dubai, also sits near the waterway.

The Strait of Hormuz through history has been important for trade, with ceramics, ivory, silk and textiles moving from China through the region. In the modern era, it is the route for supertankers carrying oil and gas from Saudi Arabia, Kuwait, Iraq, Qatar, Bahrain, the UAE and Iran. The vast majority of it goes to markets in Asia, including Iran's only remaining oil customer, China.

While there are pipelines in Saudi Arabia and the UAE that can avoid the passage, the U.S. Energy Information Administration says "most volumes that transit the strait have no alternative means of exiting the region."

Threats to the route have spiked global energy prices in the past, including during the Israel-Iran war in June.

Iran has attacked several ships in the Strait of Hormuz and threatened any ships that try to pass through, effectively closing it.

"The Strait of Hormuz is closed," declared Iranian Brig. Gen. Ebrahim Jabbari, an adviser to the paramilitary Revolutionary Guard, vowing that any ships that passed through it would be set on fire.

Previously, Iran temporarily shut down parts of the strait in mid-February for what it said was a military drill. Oil prices jumped about 6% in the following days.