A useful timeliness to help understand what has happened so far:
7 October 2023: Hamas attacks Israel, killing 1,200 and taking hundreds of others hostage. Israel then launches a retaliatory campaign, which is still going on today and has so far killed more than 23,000
14 November 2023: The Houthis, having announced their support for Hamas, vow to target Israeli-linked ships travelling through the Red Sea
19 November 2023: A cargo ship is hijacked by the Houthis - by this point, Houthis have already fired several missiles and drones towards Israel, all intercepted by US warships in the region
15 December 2023: A number of major shipping companies, including Maersk, announce they are pausing all journeys through the Red Sea
31 December 2023: US Navy helicopters sink three Houthi speed boats during an attempted attack on a container ship
3 January 2024: The US, UK and 10 other states issue a joint statement warning the Houthis they will face consequences if they continue the attacks
10 January 2024: The UN Security Council passes a resolution demanding an immediate end to the Houthi attacks. At this stage, the Houthis have launched more than 20 attacks on ships
11 January 2024: The US and UK repel a large attack in the Red Sea and hint at military action
12 January 2024: The US and UK carry out air strikes on Houthi targets in Yemen, hitting more than 16 sites
14 January 2024: The US military shoots down a missile it says was fired towards one of its warships from a Houthi area of Yemen