WASHINGTON (Reuters) – Defense Secretary James Mattis stressed the United States' persistence to NATO in a very mobile phone call with Germany's defense minister on Thursday, the Pentagon said.

Mattis assured German Defense Minister Ursula von der Leyen of "the United States’ enduring resolve for the NATO alliance," the Pentagon said inside of a statement.

It said Mattis discussed the power of NATO from a separate call with French Defense Minister Jean-Yves Le Drian. In a call with Israeli Defense Minister Avigdor Lieberman, Mattis underscored his "unwavering commitment to Israel's security," the Pentagon said.