The airstrikes came just a few hours after the US said it had targeted Houthi anti-ship cruise missiles prepared for launch.
This is the first time that US troops have been killed by enemy fire in the Middle East since the beginning of the war in Gaza.
What is clear now is that these attacks are not only increasing but settling into a new type of routine.
India's navy deployed three destroyers to maintain a deterrent presence in various locations after an attack near India's waters.
For Austin, the trip is a delicate balancing act.
US CENTCOM said that four attacks had been conducted against three separate commercial vessels in the southern Red Sea.
The strikes targeted a training facility and a safe house near the cities of al-Bukamal and al-Mayadeen.