The Slovene lands were part of the Holy Roman Empire and Austria until 1918 when the Slovenes joined the Serbs and Croats in forming a new multinational state, renamed Yugoslavia in 1929. After World War II, Slovenia became a republic of the renewed Yugoslavia, which though Communist, distanced itself from Moscow's rule. Dissatisfied with the exercise of power of the majority Serbs, the Slovenes succeeded in establishing their independence in 1991 after a short 10-day war. Historical ties to Western Europe, a strong economy, and a stable democracy have assisted in Slovenia's transformation to a modern state. Slovenia acceded to both NATO and the EU in the spring of 2004.