Cavour is now cleared to operate F-35B jets.
Rolls-Royce will supply generator sets for the U.S. Navy’s Constellation class frigate programme.
The aim of the Skyborg programme is to integrate full-mission autonomy with low-cost, attritable unmanned aircraft.
"Non-EU Allies play an essential role in protecting and defending Europe", Mr Stoltenberg said.
This is the first time that France has taken command of one of NATO's four standing naval task groups.
BAE has been awarded a $76m contract to produce additional Vertical Launch System canisters for the U.S. Navy.