This is misinformation and rage bait, as much as the US military would probably froth at the mouth to start more wars, this is simply deliberately untrue. The only declaration from the US about Yemen thus far been that UN naval assets (Chinese, American, British, French ships so far) will be mobilized to closely escort shipping through the strait and Red Sea, and that those assets have authorization to fire upon inbound pirates, missiles, and drones. The operation is titled Operation Prosperity Guardian if anyone is curious.

This was decided upon at the UN Security Council, and composes 38 different nations, this is not simply a US military decision. The directive simply creates a dedicated task force from assets originally assigned to patrol in the Indian Ocean, and along the Somali coast, into dedicated escort units. The taskforce itself is also simply a redeployment of a taskforce that was headed by the Egyptian Navy until earlier this year when the Egypt ceded leadership of that particular task force.

The US military is a force of evil, but if we mindlessly sensationalize and lie about the reality of situations, then no one will believe us when it will be most important.