Top 10 Countries that Were Part of Yugoslavia

The Top Ten
1 Croatia Croatia, officially the Republic of Croatia (independence since 1991), is a sovereign state at the crossroads of Central Europe, Southeast Europe, and the Mediterranean. Its capital city is Zagreb. It is a member of the European Union. During the Cold War it was part of Yugoslavia. It is a cultural and scientific cradle of such names as: Nikola Tesla, Paula (nobile) Preradović - author of Austrian national anthem, Ruđer Bosković the philosopher and scientist, Slavoljub Penkala - the inventor of the penkala pen, Emile Zola was Croatian by heritage, Marin Držić - the playwriter, Vatroslav Mimica - a modenist filmmaker, actors Zrinka Cvitešić and Goran Višnjić are also Croatians, Oscar ...read more.

Chill it is number one

2 Serbia Serbia, officially the Republic of Serbia, is a landlocked country in Southeastern and Central Europe, situated at the crossroads of the Pannonian Plain and the Balkans. It shares land borders with Hungary to the north, Romania to the northeast, Bulgaria to the southeast, North Macedonia to the south, Croatia and Bosnia and Herzegovina to the west, and Montenegro to the southwest, and claiming a border with Albania through the disputed territory of Kosovo. Serbia with Kosovo has about 8.6 million inhabitants. Its capital Belgrade is also the largest city.
3 Slovenia Slovenia, officially the Republic of Slovenia, is a country in Central Europe. It is bordered by Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the southeast, and the Adriatic Sea to the southwest. Slovenia is mostly mountainous and forested, covers 20,271 square kilometres (7,827 sq mi), and has a population of 2.1 million (2,108,708 people). Slovenes constitute over 80% of the country's population. Slovene, a South Slavic language, is the official language. Slovenia has a predominantly continental climate, with the exception of the Slovene Littoral and the Julian Alps. A sub-mediterranean climate reaches to the northern extensions of the Dinaric Alps that traverse ...read more.
4 Montenegro
5 Macedonia North Macedonia is a landlocked southeastern European country. It borders Greece to the south, Albania to the west, Bulgaria to the east, and Serbia and Kosovo to the north. It has a population of over 2 million people which are a mixture of Macedonians, Albanians, and Serbians. Macedonian is the official language of the country. North Macedonia has many beautiful forests, lakes, and old structures. The capital city is Skopje.
6 Bosnia and Herzegovina Bosnia and Herzegovina, abbreviated BiH or B&H, sometimes called Bosnia–Herzegovina and often known informally as Bosnia, is a country at the crossroads of south and southeast Europe, located in the Balkans. The capital and largest city is Sarajevo. Bosnia and Herzegovina borders Serbia to the east, Montenegro to the southeast, and Croatia to the north and southwest. In the south it has a 24 kilometres (15 miles) long coast, exiting on the Adriatic Sea within the Mediterranean, around the town of Neum. Bosnia, which is the inland region of the country, has a moderate continental climate with hot summers and cold, snowy winters. In the central and eastern regions of the country, the geography ...read more.
7 Kosovo Kosovo, officially the Republic of Kosovo, is a partially recognised state in Southeastern Europe. It lies at the centre of the Balkans, occupying an area of 10,887 km2 (4,203 sq mi), with a population of 1.8 million; and is bordered by the uncontested territory of Serbia to the north and east, North Macedonia to the southeast, Albania to the southwest, and Montenegro to the west. Kosovo unilaterally declared its independence from Serbia on 17 February 2008 and has since gained diplomatic recognition as a sovereign state by 98 member states of the United Nations. Most of central Kosovo is dominated by the vast plains and fields of Metohija and Kosovo. The Accursed Mountains and Šar Mountains ...read more.

If you're talking about them being unfriendly towards Serbs

Kosovo War

This is a good country