The murder at Sarajevo in Bosnia by Gavrilo Princip, a Bosnian Serb nationalist, Austrian subject and member of Young Bosnia (a secret society ), was the reason why this ultimatum was made.
International crises tend to result in war, almost by definition; they are then remembered best not as crises but as causes of wars.
Willam Belli | Melvin Belli | Giulio Belli | Skull of ''C. belli'' ROM 5436, type of ''C.'' "brevirostris", on display at the Royal Ontario Museum | Missa in tempore belli | Giuseppe Gioachino Belli | Edo Belli | Casus belli | Carlos Germán Belli | Agostina Belli |
On March 28, Czechoslovak and Yugoslavians envoys declared a restoration would be a casus belli; on April 1 the diet (with legitimists abstaining) passed a unanimous resolution praising Horthy's conduct and endorsing the status quo, and calls for Charles' arrest grew (Horthy adamantly refused this); by April 3 Briand publicly denied any deal had been made.