The first declaration of war in World War I was triggered by the assassination of Archduke Franz Ferdinand of Austria-Hungary on June 28, 1914. This event led Austria-Hungary to issue an ultimatum to Serbia, which, when only partially accepted, resulted in Austria-Hungary declaring war on Serbia on July 28, 1914. This declaration set off a chain reaction of alliances and treaties, rapidly escalating the conflict into a full-scale war.
The assassination of Archduke Franz Ferdinand of Austria, by Gavrilo Princip on June 28, 1914. On July 23, 1914, Austria set an ultimatum for Serbia to leave Austria. This ultimatum would expire on July 28, 1914. When the Serbs would still not leave, Austria declared war on Serbia.
The final straw that led to World War I was the assassination of Archduke Franz Ferdinand of Austria-Hungary on June 28, 1914, in Sarajevo. This event triggered a series of diplomatic crises and alliances, as Austria-Hungary issued an ultimatum to Serbia, which was partially rejected. As tensions escalated, the complex web of alliances pulled multiple countries into the conflict, culminating in the declaration of war in July 1914.
Archduke Francis Ferdinand of Austria was assassinated on June 28, 1914, in Sarajevo by Gavrilo Princip, a Bosnian Serb nationalist. This event set off a chain reaction of political alliances and tensions in Europe, leading Austria-Hungary to issue an ultimatum to Serbia. When Serbia's response was deemed unsatisfactory, Austria-Hungary declared war, prompting Russia to mobilize in defense of Serbia, which eventually escalated into a full-scale conflict involving multiple nations and alliances, igniting World War I.
World War I began with the assassination of Archduke Franz Ferdinand of Austria-Hungary on June 28, 1914, by a Serbian nationalist. This event triggered a series of diplomatic crises, leading Austria-Hungary to issue an ultimatum to Serbia. When Serbia's response failed to satisfy Austria-Hungary, it declared war on July 28, 1914. The conflict quickly escalated as alliances between major powers, including Germany, Russia, and France, drew multiple nations into a full-scale war.
You have not told us which event, or which revolution you are asking about.
On July 31 Germany sent a 24-hour ultimatum requiring Russia to halt its mobilization and an 18-hour ultimatum requiring France to promise neutrality in the event of war between Russia and Germany.
It wasn't directly a country that started WW1 but there wasn't a specific event that caused it either, it was just a build up of events. One of the most common and one of the biggest events that happened before WW1 was the assassination of Arch Duke Franz Ferdinand.
The assasination of Archduke Franz Ferdinand
Many events happen in Serbia every day. Please ask a specific question.
onFocus
The crisis in the Balkans was set off by the assassination of Archduke Franz Ferdinand of Austria-Hungary on June 28, 1914, in Sarajevo. This event heightened existing tensions among the Balkan states, fueled nationalist sentiments, and triggered a series of alliances and mobilizations. The assassination led Austria-Hungary to issue an ultimatum to Serbia, ultimately resulting in the outbreak of World War I, which significantly reshaped the region. The crisis was rooted in ethnic conflicts, territorial disputes, and the decline of empires in the area.