Resolves YES if US forces get involved in combat operations against Hamas or any other forces that join the war against Israel.
These war markets are a bit of a mess of underspecified criteria, so I've bet this up to 50% and won't argue too hard for this, but the US sank a Houthi vessel in the Mediterranean, killing at least ten:
US army attacks three Houthi boats in Red Sea, killing at least 10 fighters
Yemen’s Houthi rebels say they have lost at least 10 fighters after three of their vessels were attacked by US forces in the Red Sea.
[...]
Helicopters from two US warships – the USS Eisenhower and USS Gravely – shot at the “Iranian-backed Houthi small boats” in self-defence on Sunday morning while responding to an SOS call from the Singapore-flagged vessel Maersk Hangzhou, the US Central Command (CENTCOM) said.
The US helicopters sunk three of the boats, killing several of their crew, it said. A fourth boat escaped.
Maersk Hangzhou issued its distress call after it was fired at by the Houthi boats, which came as close as 20m (65 feet) and also tried to board it, CENTCOM said in a statement on X, formerly Twitter.
[...]
Amid Israel’s war on Gaza, Yemen’s Iran-aligned Houthis have repeatedly targeted vessels they believe are linked to Israel travelling in the Red Sea, pushing major global shipping companies, such as Maersk, to abandon the waterway.
The Houthis have said they will continue their strikes until Israel’s attacks on Gaza stop.
The Houthi are listed as belligerants on Wikipedia:
@chrisjbillington no argument on US vs Houthis, but I just don't think it's correct to say the Houthis have "joined the war" against Israel. Hezbollah has been far more active but the market on those exchanges constituting a war was resolved NO
@AlQuinn Which market resolved NO on Hezbollah?
Unfortunately different markets have different ideas about what "joining the war" means and who counts. I don't know what this creator had in mind, or else I'd have either bet the market higher, or not at all. This market is scant on details and doesn't say that the entity joining the war has to be a "nation" or anything, it just says "any other forces", which is pretty broad.
Wikipedia says Houthis are a belligerent in the war, so I think it's pretty clear they're in the war - other markets presumably aren't counting them because they're a rebel group and not a recognised country?
@chrisjbillington This market:
Agreed the criteria here are vague, so won't argue too strongly in this direction either.