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This is to say nothing of Russia, which has condemned the air strikes in strong terms. And so did China, in slightly more indirect ones.

This is to say nothing of Russia, which has condemned the air strikes in strong terms. And so did China, in slightly more indirect ones. Russia has little exposure to the route and is even hoping to benefit from the Houthi attacks:

Russian officials contend that the confrontation in the Red Sea is economically advantageous to it. Russia’s exports and imports largely pass through its Far East ports and railway links with China. No more than about 10% of its foreign trade goes through the Suez Canal and, in any case, that has not — so far — been affected.

Putin claimed that the Red Sea standoff could prompt shipping companies to switch to the Northern Sea Route that runs along Russia’s Arctic coast.

And when it came to air strikes, Western countries were less united:

Italy, Spain and France stood out [...] by not taking part in U.S. and British strikes against the Houthi group in Yemen and not signing a statement put out by 10 countries justifying the attacks.

The divergence highlights divisions in the West over how to deal with the Iranian-backed Houthis, who have been targeting civilian ships in the Red Sea for weeks in what they say is a protest against Israel's military campaign in the Gaza Strip.

The Netherlands, Australia, Canada and Bahrain provided logistical and intelligence support for the operation, U.S. officials said.

In addition, Germany, Denmark, New Zealand and South Korea signed a joint statement with these six nations defending the overnight attacks and warning of further action to protect the free flow of Red Sea trade if the Houthis did not back down.

[...] Speaking on condition of anonymity, a French official said Paris feared that by joining the U.S.-led strikes, it would have lost any leverage it had in talks to defuse tensions between Hezbollah and Israel. France has focused much of its diplomacy in recent weeks on avoiding an escalation in Lebanon.

[...] Spanish Defence Minister Margarita Robles said Madrid had not joined the military action in the Red Sea because it wanted to promote peace in the region.

Italian Defence Minister Guido Crosetto earlier this week, made clear his reluctance to target the Houthis, telling Reuters that their aggression had to be stopped without triggering a new war in the region.

And the same 3 countries also didn't join "Prosperity Guardian":

The diverging opinions in the West over how to tackle the Houthi threat emerged last month when the United States and a number of its allies launched Operation Prosperity Guardian to protect civilian vessels in the busy Red Sea shipping lanes.

Italy, Spain and France did not sign up to the mission, unwilling to put their naval vessels under U.S. command.

All three already participate in an EU anti-piracy operation off the Horn of Africa, and the Spanish defence minister on Friday said the European Union might soon decide on a new initiative.

This is to say nothing of Russia, which has condemned the air strikes in strong terms. And so did China, in slightly more indirect ones.

FWTW:

[US] Officials say they don’t expect that the operation will stretch on for years like previous U.S. wars in Iraq, Afghanistan or Syria. At the same time they acknowledge they can identify no end date or provide an estimate for when the Yemenis’ military capability will be adequately diminished.

Nonetheless

[...] They point out that more sophisticated attacks, like a large-scale one that occurred Jan. 9, have not been repeated since the U.S.-led strikes began. “Recall before the strike we had U.S. ships attacked with 20-plus UAVs and multiple missiles in a single attack,” a second American official said, using a military acronym for drone aircraft.