[5][6] Within days of meeting Zimmermann, Izetbegović withdrew his signature and renounced the peace plan he agreed to in Lisbon, suddenly declaring his opposition to any type of ethnic division of Bosnia and Herzegovina.

Three and a half years later, the Dayton Accord that all three sides accepted in November 1995 thus ending the war, featured a very similar canton system, dividing Bosnia-Herzegovina internally along ethnic lines.

[7] Writing in 1997, Alfred Sherman, British political analyst and an adviser to Margaret Thatcher, described Zimmermann's involvement in Bosnia, along with American overall foreign policy in the Balkans, as: "lying and cheating, fomenting war in which civilians are the main casualty, and in which ancient hatreds feed on themselves".

According to journalist Samantha Power, the author of A Problem from Hell: America and the Age of Genocide, Zimmermann's career in Yugoslavia was marked by "frustration with the resistance of the Bush administration to intervene".

"Tuđman admitted that he discussed these fantasies with Milošević, the Yugoslav Army leadership and the Bosnian Serbs," writes Zimmerman, "and they agreed that the only solution is to divide up Bosnia between Serbia and Croatia".