The announcement marks the most specific details the Defense Department has released about its secretive, fast-track drone effort.

The Pentagon announced on Wednesday that it will add two new types of drones and more networking software to its ambitious Replicator initiative aimed at rapidly putting thousands of drones in the hands of the military.

The US Department of Defense (DoD) has expanded its Replicator initiative by adding two new types of uncrewed aerial systems (UAS) and more networking software.

Yemen's Houthi rebels targeted two U.S. Navy warships with multiple drones and missiles as they were traveling through the Bab el-Mandeb Strait, but the attacks were not successful, the Defense Department said Tuesday.

The Iranian-backed Houthis launched at least eight drones, five anti-ship ballistic missiles, and three anti-ship cruise missiles at the American vessels.