I really had no idea about this conflict before until I got to this forum.
What is the main conflict going on there right now, how did it start, and why?
In little words, or as many as you want and be realistic (try not to be biased)
Our brother Serb_Canadian provided an good answer.
I will only add a few things.
The war in Bosnia was a catastrophe for the people of whole Bosnia and Herzegovina.
The European factor will be engaged in the conflicts of Yugoslavia if Croatians exists and the Croatian factor will be engaged in the Bosnian conflict if the Bosnian Muslims exist!
This war could easily be avoided and nobody in Bosnia needed a war in the former Yugoslavian federal unit of Bosnia and Herzegovina.
Every side discovered that the war brought bad consequences to all the people of Bosnia and Herzegovina.
The Republic of Croatia under the rule of Franjo Tudjman committed secession from Yugoslavia in 1991 - by declaring irregular independence from the international recognized federation of Yugoslavia. This policy of Croatia was not legal because it was violating the constitution of Yugoslavia and Yugoslavia was international recognized, that means also that Yugoslavian laws were recognized on the territory of whole Yugoslavia. When in 1991 Croatia reformed the constitution of S. R Croatia, Croatia violated the nature of S. R Croatia. According to
Yugoslavian constitution, Croatia was a bi-national state, a state of the Croats and Serbia who live in Croatia. The new constitution of Croatia (which was introduced by Franjo Tudjman in 1991) violated the constitutional rights of the Serbs, because it reduced the Serbs - a state building nation - to a national minority. This irregular act was recognized by the Western nations.
We Serbs doubt that the international community and the West, would tolerate if for example Belgium - also an bi-national state - decides to violate the constitutional rights of one of the two peoples of Belgium, the Flemish or the Walloon people and send them in exile.
In 1991 the civilized Europe and the USA accepted the Croatian policy against the Serbs. According to this Croatian policy Serbs are no longer an state building nation on the territory where they lived for more than thousand years long.
The Croatian government could only create independent state of Croatia if first Croatia solves the Serbian question, because of course Serbs would not allow Croatia to easily deprive them of their historical and national rights. This Croatian policy resulted into a civil war between the Krajina Serbs and the Croatian government in 1991.
Franjo Tudjman who aimed to establish ethnic clean and independent Croatia knew that Bosnian Serbs who live in the neighboring federal unit
of Croatia, which is Bosnia, would help the Krajina Serbs. Thats why Franjo Tudjman sent Croatian troops in 1991-1992 to Bosnia to prepare the Bosnian Muslims to attack the Bosnian Serbs and to provoke a civil war in former federal unit of Bosnia and Herzegovina. If the Bosnian Serbs would have their own problems on their own territories, than they will not be able to disturb the Nazi project of Tudjman to create an independent and ethnic clean Republic of Croatia.
Bosnian Muslims were fighting and dieing for Croatia during the period between 1992 and 1995.
Croatia achieved its goals but Bosnian Muslims did not!