NATO chief Mark Rutte Friday welcomed President Donald Trump’s announcement that 5,000 US troops would head to Poland, after an earlier planned deployment was called off amid pressure for Europe to fend for itself.

“Of course, I welcome the announcement,” the secretary general told reporters ahead of a meeting of the alliance’s foreign ministers in Sweden, adding that NATO “military commanders are working through all the details”.

In a social media post, the US president said the move was based on his relationship with Poland’s president Karol Nawrocki, a nationalist ally.

Trump did not give details but it appeared to reverse a decision to call off sending US 4,000 troops to the country—seen as a signal of his anger over NATO allies’ lack of support in the Iran war.