Croatia's accession followed a decade-long process of legal reform, anti-corruption efforts, and negotiations that began soon after it applied in 2003. The milestone came less than 20 years after the Croatian War of Independence, marking the country's definitive turn toward Western Europe and away from the shadow of Yugoslav dissolution.
Croatia's road to Brussels ran directly through the ruins of Yugoslavia's collapse. The country fought a brutal war of independence from 1991 to 1995, marked by the siege of Vukovar and the shelling of Dubrovnik's old town, before emerging as an internationally recognized state that spent the following decade rebuilding institutions and its economy.
EU accession negotiations, opened in 2005, dragged on for years over judicial reform, war crimes cooperation with the Hague tribunal, and lingering border disputes with neighboring Slovenia. Croatia's chief war crimes hurdle involved securing the cooperation and eventual convictions tied to generals like Ante Gotovina, whose prosecution became a flashpoint of national pride and international pressure.
When Croatia finally joined on this date, it became the EU's 28th member and the first former Yugoslav republic (after Slovenia) to do so, a symbolic marker of the Balkans' long, uneven journey from war to European integration. Croatia would later adopt the euro and join the Schengen zone in 2023, completing its European integration a decade after accession.