A day after being sworn in as the new U.S. Secretary of State, Mike Pompeo arrived in Brussels for talks with key allies in Europe on ways to strengthen the NATO military alliance.

Pompeo, a former army officer who was a republican congressman, is regarded as a loyal supporter of U.S. President Donald Trump with hawkish world views.

A state department official told reporters that the meeting, a preview to the leaders’ summit in July, will discuss Russia’s aggression in Ukraine, Georgia and in Syria, as well as plans for increasing security along Europe’s southern frontier.