Protesters in Denmark and Greenland demonstrated ‍on Saturday against US president Donald Trump’s demand that the Arctic island be ceded to the US. The demonstrators called on the US to respect Greenlanders’ right to self-determination.

Mr Trump Greenland is vital to US security because of its strategic location and large mineral deposits. He has not ruled out using force to take it. European nations this week sent military personnel to the island at Denmark’s ‌request.

In Copenhagen, demonstrators chanted “Greenland is not for sale” and held up slogans such as “No means No” ⁠and “Hands off Greenland” alongside the territory’s red-and-white flag as they marched to the US embassy.

Some wore red ‌baseball ​caps ‍resembling the “Make America Great Again” caps of Trump supporters, but with the slogan “Make America Go Away”.

In Greenland’s capital Nuuk, hundreds of protesters led by prime minister Jens-Frederik Nielsen carried flags and similar banners as they headed for the US consulate.

They passed a newly ⁠built block where Washington plans to move its consulate – currently a red wooden building with four staff.

Organisers estimated over ⁠20,000 people attended the protest in Copenhagen – akin ⁠to the entire population of Nuuk – though police did not provide an official figure. Other protests were held across Denmark.

Trump threatens tariffs over Greenland opposition Opens in new window ]

“I am very grateful for the huge support we as ‍Greenlanders receive … we are also sending a message to the world that you all must wake up,” said Julie Rademacher, chair of Uagut, an organisation for Greenlanders in Denmark.

Mr Trump’s repeated statements about the island have triggered a diplomatic crisis between the US and Denmark, both founding members of the NATO military alliance, and have been widely condemned in Europe. The territory of 57,000 people, governed for centuries from Copenhagen, has carved out significant autonomy since 1979 but remains part of ‌Denmark, which controls defence ‌and foreign policy, and funds much of the administration.

About 17,000 Greenlanders live in Denmark, according to Danish authorities.

All five parties elected to Greenland’s parliament ultimately favour independence, but they disagree on the ‌timing and have recently said they would rather remain part of Denmark than join the US.

Only 17 per cent of Americans approve of Mr ⁠Trump’s efforts to acquire Greenland. Large majorities of Democrats and Republicans oppose using military force to annex it, a Reuters/Ipsos poll found. Mr Trump called the poll “fake”. – Reuters