Greenland and Denmark have formed a united front to face down U.S. President Donald Trump, momentarily setting aside the troubled history between them.

The Arctic island, a Danish colony for three centuries, still has a complicated relationship with Denmark, which now rules it as an autonomous territory.

Greenland’s main political parties all want independence, but disagree on how exactly to get there. Trump’s designs on the island led them to forge a coalition government in March last year.