[3] Denmark and Poland are now strategic partners due to the Baltic Pipe and close military cooperation within the Multinational Corps Northeast of NATO.

Danish-Polish relations date back to the Middle Ages, with both countries adopting Christianity around 965–966 and thus joining the Western civilization.

[11] He suddenly died of an unknown disease in Slesvig in 1423 and was buried in Haderslev, making it the northernmost burial place of a Polish ruler.

King Frederick II of Denmark sought sole supremacy in the Baltic Sea, thus he attempted to hinder the growth of Poland as a maritime power and supported the rebellion of the bourgeoisie of Gdańsk, the largest port city of Poland, against Polish King Stephen Báthory and entered into talks to take Gdańsk under Danish suzerainty.

[17] Polish King Stephen Báthory still offered privileged terms to Denmark regarding trade in the Baltic Sea in an effort to make a new Dano-Polish alliance possible.

[18] Exaggerated rumours of an allegedly detailed plan to divide Denmark between Sweden and Spain with the participation of Poland and the forcible re-introduction of Catholicism in Denmark spread across Europe, causing concern in Protestant countries, even though Polish-Swedish talks of a potential new alliance had barely begun.

[19] In 1579, Frederick II of Denmark offered Poland an alliance against Russia, which, however, in view of the conflict of interests, was not concluded, but Danish-Polish relations remained good afterwards with the Danish Navy blocking Russian trade through the Baltic Sea.

[23] In Nysa, Poland, there is a road called Aleja Duńczyków (Avenue of the Danes), built in 1864–1866 by Danish soldiers taken prisoner by Prussia in the Second Schleswig War.

[25] In the following months, the Danish legation in Warsaw would send reports back on Polish border conflicts, war with Russia and domestic problems, while the territorial ambitions of the new county were met with caution.

Before the Locarno conference in 1925, mainstream Polish media called for Poland and Denmark to cooperate so that both countries could be included in the defense pact negotiated by the Western powers with Germany.

Geographical integration itself was less productive, as Polish politicians simply found it difficult to grasp the Danish security doctrine of supporting disarmament during the interwar period.

[23] During the interwar period, Poland had military intelligence people in Denmark who cooperated with their Danish counterparts against Germany.

In the 1950s, Danish-Polish relations improved with Poland elevating their representation in Copenhagen to an embassy on 15 August 1957 and appointed Stanisław Wincenty Dobrowolski as ambassador.

They moreover agreed to develop economic and cultural exchange but Denmark refused to include the Rapacki Plan in their joint communique for fear of it being used as propaganda.

Denmark did privately raise the proposal to their NATO allies and banned the presence of nuclear weapons on their territory.

In the 1980s, communication decreased as Denmark joined other Western countries in pressuring Poland to re-establish dialogue with Solidarność and the Church.

[39] The cooperation was further developed in January 1994 with the two countries signing the first annual programme, which would determine the concrete activities which were to be carried out in the year.

[40] In September 1994, Denmark took part in the five-day Partnership for Peace military exercise codenamed "Cooperative Bridge 94" in Biedrusko.

[43][44] From 1991 to 2000, Denmark was one of the largest contributors to the Polish environmental sector comprising more than 35 per cent of the total bilateral assistance to the country.