“We do not want to become Americans, we do not want to be Danish, we want to be Greenlanders”, stated all Greenlandic political party leaders on January 9, 2026. President Trump’s threats to annex Greenland disrupt a long process of decolonization from Denmark. The authors examine what Greenland and others can do, legally, to oppose US annexation demands and defend the right of Greenlanders to self-determination.