Up until the 20th century, Poland's relations with Croatia was mostly conducted throughout the relations between Poland and various entities ruling Croatia, notably Poland's relations with Hungary, Austria and Yugoslavia. Poland and Croatia were united by a personal union under the union of Hungary and Poland during the reign of kings Louis I of Hungary in 1370–1382, and Władysław III of Poland in 1440–1444. Poles and Croats fought side by side against the Ottoman invasion of Europe in several battles, including at Nicopolis (1396), Varna (1444) and Mohács (1526).
In the interbellum, a Consulate-General of Poland was based in Zagreb, and honorary consulates of Poland were located in Dubrovnik, Split and Sušak.[1]
Poland recognized Croatia on 15 January 1992 along with 16 other, mostly European countries. Diplomatic relations between two countries were established on 11 April 1992.[3]
During the Yugoslav Wars, the Croatian 103rd Infantry Brigade received a small number of Polish volunteers. In 1992–1995, a Polish military contingent was stationed in Croatia as part of the peacekeeping mission of the United Nations Protection Force. Since 2018, a Croatian military contingent has been stationed in Poland as part of the NATO Enhanced Forward Presence defense forces.
^Ceranka, Paweł; Szczepanik, Krzysztof (2020). Urzędy konsularne Rzeczypospolitej Polskiej 1918–1945. Informator archiwalny (in Polish). Warszawa: Naczelna Dyrekcja Archiwów Państwowych, Ministerstwo Spraw Zagranicznych. pp. 122, 362, 369, 430. ISBN978-83-65681-93-5.
^ abWróbel, Janusz (2020). "Odbudowa Armii Polskiej u boku sojuszników (1939–1940)". Biuletyn IPN (in Polish). No. 1–2 (170–171). IPN. p. 104. ISSN1641-9561.