Level 1 — Absolute Beginner
Iran fires missiles at two big oil ships on July 13, 2026. The ships are named Mombasa and Al Bahiyah. They are sailing in the Strait of Hormuz.
One worker on the ships dies. Eight other workers get hurt. The ships were in a part of the sea near the country of Oman.
Iran also says it hits US bases in Bahrain and radar machines in Oman. This is the fourth night in a row that the US and Iran attack each other.
President Trump says the US will protect the strait like a guardian angel. He says ships will now pay a toll to pass through safely. The price of oil goes up a lot.
- missile
- A weapon that flies through the air to hit a target far away
- tanker
- A large ship built to carry oil or other liquids
- crew
- The group of people who work on a ship
- injured
- Hurt in the body
- base
- A place where soldiers and military equipment are kept
- radar
- A machine that uses radio waves to find planes or ships
- guardian
- A person or group that protects something
- toll
- Money paid to use a road, bridge, or waterway
Level 2 — Elementary
On July 13, 2026, Iran fired cruise missiles at two oil tankers, the Mombasa and the Al Bahiyah, as the ships sailed through the southern lane of the Strait of Hormuz near Oman's coast.
The United Arab Emirates' Ministry of Defense said the strikes killed one crew member and injured eight others. The tankers were badly damaged during the attack.
Iran's Revolutionary Guard also announced that it had struck US military facilities in Bahrain and radar systems in Oman, marking the fourth straight night of exchanges between the United States and Iran.
President Trump responded by saying the United States would act as the strait's 'guardian angel' and would begin charging a toll for ships that want safe passage. News of the attack pushed Brent crude oil prices above $83 a barrel.
- cruise missile
- A guided missile that flies at low altitude to hit a specific target
- shipping lane
- A regular route that ships follow across the sea
- defense ministry
- A government department in charge of a country's armed forces
- facility
- A building or place built for a particular purpose
- exchange (of attacks)
- A back-and-forth series of strikes between two sides
- safe passage
- Permission or ability to travel through an area without danger
- crude oil
- Unrefined petroleum as it comes out of the ground
- barrel
- A standard unit used to measure quantities of oil
Level 3 — Intermediate
Iran fired cruise missiles at the oil tankers Mombasa and Al Bahiyah on July 13, 2026, as the vessels transited the Strait of Hormuz's southern shipping lane, which hugs the coast of Oman, according to the United Arab Emirates' Ministry of Defense.
The strikes killed one crew member and injured eight others, leaving both tankers with significant damage. The attack came amid a broader escalation that has disrupted crossings through the strait, a chokepoint through which roughly a fifth of the world's oil supply normally flows.
Iran's Revolutionary Guard separately claimed it had targeted US military facilities in Bahrain and radar installations in Oman, extending a fourth consecutive night of exchanges between American and Iranian forces after last month's ceasefire collapsed.
President Trump framed the American response in striking terms, declaring the United States would serve as the strait's 'guardian angel' and would begin charging vessels a toll for safe transit. Traders reacted swiftly: Brent crude futures climbed above $83 a barrel, extending a run-up driven by fears over energy supply disruptions.
- vessel
- A ship or large boat
- transit
- To travel through or across a place
- chokepoint
- A narrow passage that controls the flow of traffic, goods, or resources
- escalation
- A rapid increase in the seriousness or intensity of a conflict
- installation
- A piece of military equipment or a facility set up for a specific use
- ceasefire
- A formal agreement to stop fighting
- futures (oil futures)
- Contracts to buy or sell oil at a set price on a future date
- disruption
- A disturbance that interrupts a normal process or event
Level 4 — Advanced
Iranian forces fired cruise missiles at the oil tankers Mombasa and Al Bahiyah on July 13, 2026, as the vessels transited the Strait of Hormuz's southern shipping lane hugging the Omani coastline, the United Arab Emirates' Ministry of Defense confirmed, reporting one crew fatality and eight injuries.
The strike represents an escalation of an already volatile standoff over the strait, a chokepoint through which roughly a fifth of global seaborne oil transits, and comes as crossings have already fallen by more than half from the prior week amid a de facto blockade environment.
Iran's Islamic Revolutionary Guard Corps separately asserted it had struck American military facilities in Bahrain and radar installations in Oman, extending a fourth consecutive night of tit-for-tat exchanges since last month's ceasefire unraveled, with US Central Command framing its own strikes as efforts to degrade Iranian capacity to threaten commercial shipping.
President Trump's characterization of Washington's posture as the strait's 'guardian angel,' paired with his proposal to levy a toll on vessels seeking safe transit, drew swift market reaction: Brent crude futures pushed above $83 a barrel, underscoring how directly geopolitical brinkmanship over a single waterway can ripple through global energy markets.
- fatality
- A death resulting from an accident or attack
- volatile
- Likely to change suddenly and unpredictably, especially for the worse
- standoff
- A situation in which conflict is not resolved and no side backs down
- de facto
- Existing in practice, even if not officially declared or recognized
- tit-for-tat
- An action taken in retaliation for a similar action by the opposing side
- degrade (military)
- To reduce the strength or effectiveness of a military capability
- levy
- To impose a tax, fee, or toll
- brinkmanship
- The practice of pushing a dangerous situation to the point of maximum risk to gain advantage