[1] As vice president, Boban said in April 1991 that HDZ BiH and the Croat people as a whole advocate the view that Bosnia and Herzegovina is sovereign and indivisible.

In October 1991, the Croat village of Ravno in Herzegovina was attacked and destroyed by Yugoslav People's Army (JNA) forces before turning south towards the besieged Dubrovnik.

Bosnian president Alija Izetbegović did not react to the attack on Ravno and gave a televised proclamation of neutrality, stating that "this is not our war".

[6] On 12 November 1991, Boban chaired a meeting with local party leaders of the HDZ BiH, together with Dario Kordić.

[citation needed] On 18 November 1991, Croat representatives established the Croatian Community of Herzeg-Bosnia in Mostar as a "political, cultural, economic and territorial whole".

[7] One of Boban's advisers stated that Herzeg-Bosnia was only a temporary measure and that the entire area will be an integral part of Bosnia and Herzegovina when the war ends.

They discussed Bosnia and Herzegovina's future, their differences in opinion on it, and the creation of a Croatian political strategy.

[12] Kljuić resigned from his position as president of HDZ BiH in February 1992, at a meeting of the party in Široki Brijeg.

[5] Boban met with Radovan Karadžić, president of Republika Srpska, on 6 May 1992 in Graz, Austria where they reached an agreement for a ceasefire.

They discussed the details of the demarcation between a Croat and Serb territorial unit in Bosnia and Herzegovina and stressed the need for further negotiations together with the European Community.

[16] However, the conflict continued and on the following day the JNA and Bosnian Serb forces mounted an attack on Croat-held positions in Mostar.

[17] In September 1992, Boban said that "We want an independent Bosnia and Herzegovina, a joint state of three nations in which, like others, Croats will be sovereign".

[21] In late July 1993 the Owen-Stoltenberg Plan was proposed by United Nations mediators Thorvald Stoltenberg and David Owen that would organize Bosnia and Herzegovina into a union of three ethnic republics.