"We're already working very closely with the GNA to determine what assistance they may require," he added.
The situation in Libya is of concern to Europe and the broader region as well, U.S. officials have said, because of the possible spread of terrorism, as well as the concerns over migration.
Terrorism is a concern in Europe, said Scaparrotti, noting Eucom has been "integral in supporting our partners here" to fight terrorism. Those efforts, he said, include information sharing and building partner capacity.
"We'll continue to do those things that [outgoing Eucom commander Air Force Gen. Philip M.] Breedlove and the command have done in the past, and we'll look for other ways to strengthen our partners here," Scaparrotti said.
The U.S. military is continuing to make adjustments to counter Russian aggression, Carter said.
"That's the reason for the addition of an American brigade on a rotational but persistently present basis here," he said. "We are prepared every day for any kind of circumstance here in Europe.”
Improvements will continue to be made, including with the European Reassurance Initiative, which the United States is more than quadrupling funding for, Carter said.