US defense officials claim they have no boots on the ground in Yemen, despite a recent acknowledgement that US forces are indeed present in the war-torn Gulf state, a 27 January report from The Intercept shows.

Pentagon contradicts White House about US troop presence in Yemen

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Biden’s announcement on ending US support for the war in Yemen, explained

But that doesn’t mean the US will stop fighting in Yemen. Per the administration, it will continue to strike al-Qaeda and ISIS militants in the country to ensure they can’t use it as a base to hatch plots against America. The US has been targeting terrorists in Yemen, most of them against al-Qaeda, since 2002 and has killed around 1,000 people in strikes. Stopping that campaign, experts say, might give the terrorists more space to operate.

So ending support for the fight against the Houthis, and continuing the fight against America-threatening terrorists — that’s pretty straightforward. What isn’t as clear is what the second element, supporting Saudi Arabia’s defense, means in practice.

The biggest complication here is what defines an “offensive” versus a “defensive” move. Say the Houthis attack Saudi Arabia, which experts I spoke to expect they will continue to do. The rebels launched missiles at an airport and airbase in Saudi Arabia in 2019, and at Saudi oil stations last year. Under international law, Riyadh has the right to retaliate in a commensurate way.