July 23, 1914: The Ultimatum That Set the World on Fire

By Cliff Potts
WPS News

BAYBAY CITY, LEYTE, PHILIPPINES — July 23, 2026 — 07:05 PhST

On July 23, 1914, Austria-Hungary delivered an ultimatum to Serbia following the assassination of Archduke Franz Ferdinand and his wife, Sophie, in Sarajevo. Serbia accepted most of the demands but refused provisions that would have allowed Austro-Hungarian authorities to operate inside Serbia. Austria-Hungary declared war on Serbia on July 28. Russia mobilized in Serbia’s defense; Germany declared war on Russia on August 1 and France on August 3. German troops then invaded neutral Belgium, prompting the United Kingdom to declare war on Germany on August 4. In only 12 days, a confrontation between Austria-Hungary and Serbia activated alliances, military plans, imperial ambitions, and old hostilities, turning a regional crisis into a European war that soon spread across much of the world.

A War That Reshaped the World

World War I lasted from July 28, 1914, until the Armistice took effect on November 11, 1918. More than 70 million military personnel were mobilized, including roughly 60 million Europeans. Fighting extended far beyond the trenches of France and Belgium. Campaigns were conducted in Eastern Europe, Italy, the Balkans, the Ottoman Empire, Africa, the Middle East, Asia, and across the world’s oceans.

The war combined mass armies with industrialized weapons capable of killing on a scale earlier generations had never experienced. Machine guns cut down advancing infantry. Heavy artillery destroyed towns and churned farmland into mud. Poison gas burned lungs and blinded soldiers. Submarines attacked military and civilian shipping. Aircraft became weapons of reconnaissance, bombing, and aerial combat. Tanks were introduced in an attempt to break through fortified trench systems.

Battles such as Verdun, the Somme, Passchendaele, Gallipoli, and the Meuse-Argonne Offensive became synonymous with prolonged slaughter. Soldiers could fight for months to gain a few miles—or sometimes only a few yards—of devastated territory.

Estimates vary, but approximately 9 million to 10 million military personnel were killed. Millions of civilians also died through military action, occupation, famine, displacement, disease, and genocide. The influenza pandemic that spread during the war’s final year added another layer of mass death to societies already exhausted by four years of fighting.

The conflict destroyed or fatally weakened four major empires: the German, Austro-Hungarian, Ottoman, and Russian empires. Borders were redrawn, new countries were created, populations were displaced, and revolutionary movements gained strength. The punitive peace imposed on Germany, unresolved territorial disputes, economic destruction, nationalism, and political extremism helped create the conditions from which World War II emerged only two decades later.

World War I did not merely alter national boundaries. It changed the relationship between governments and citizens, accelerated technological warfare, expanded state power, and left millions of families grieving people who had died far from home.

The Missing Have Never All Come Home

In 2026, more than a century after the fighting ended, there is still no single complete and universally accepted count of every World War I servicemember whose remains were never recovered. Records were destroyed, empires disappeared, borders changed, military units were annihilated, and different countries used different definitions for “missing,” “unknown,” “unidentified,” and “having no known grave.”

The best-supported international estimate is that more than 700,000 World War I soldiers remain missing, meaning their bodies were never recovered, were recovered but never identified, or their final burial locations remain unknown (Meucci et al., 2022). This figure includes soldiers from opposing armies and many nationalities, although no surviving database provides a precise, side-by-side global total for every country involved.

The Commonwealth War Graves Commission records nearly 700,000 names from the two world wars on memorials for personnel who have no known grave, were lost at sea, or could not be individually identified. A substantial portion of those names belong to the First World War. The Thiepval Memorial in France alone bears the names of 72,311 British and South African servicemen who died in the Somme sector and have no known grave (Commonwealth War Graves Commission, 2026a).

These memorial inscriptions do not necessarily mean that every man’s body remains somewhere beneath an old battlefield. Some were buried as unknown soldiers. Some were destroyed by artillery. Some died at sea. Others were placed in temporary graves that were later lost. Thousands, however, remain physically unrecovered beneath fields, forests, former trenches, collapsed tunnels, and modern communities.

The missing came from all sides. British, French, German, Austro-Hungarian, Russian, Ottoman, Italian, American, Canadian, Australian, New Zealand, Indian, African, and other troops disappeared into the machinery of industrial war. In the Belgian Westhoek alone, researchers estimate that the bodies of nearly 100,000 soldiers have never been found (Van der Auwera, 2022).

They are still being discovered.

Farming, road construction, housing projects, archaeological work, and battlefield clearance regularly expose human remains. In northern France, approximately 40 to 70 World War I bodies are found during an average year. Identification may depend on fragments of uniforms, identification discs, equipment, dental evidence, military records, and, when suitable relatives can be located, DNA analysis (Le Monde, 2024).

The Commonwealth War Graves Commission reports being notified of approximately 150 discoveries of human remains from the two world wars each year. Some individuals can be identified and returned to named graves. Others receive military funerals as unknown soldiers because the evidence needed to restore their names no longer exists (Commonwealth War Graves Commission, n.d.).

In 2023, the remains of an unidentified World War I soldier were buried with full military honors at the Oise-Aisne American Cemetery in France. It was the cemetery’s first burial since 1932 and the first burial there of an unknown World War I soldier in generations (American Battle Monuments Commission, 2023). Such ceremonies demonstrate that the work of burying the First World War’s dead has not ended.

That Is the Cost of War

Behind every missing soldier was a family that waited.

Parents watched the mail. Wives raised children alone. Children grew old without knowing where their fathers had died. Some families received nothing more than a telegram stating that a son, husband, brother, or father was missing and presumed dead. There was no body to bring home, no confirmed grave to visit, and often no reliable account of his final moments.

More than 112 years after Austria-Hungary issued its ultimatum to Serbia, the earth still holds men swallowed by the war that followed. Their governments have changed. Their regiments have disappeared. The people who personally remembered them are almost entirely gone. Yet their bones remain beneath the former battlefields, and their names remain carved into stone.

Political leaders can issue ultimatums in carefully chosen language. Governments can declare war with signatures, speeches, flags, and patriotic music. Generals can draw arrows across maps. None of them can guarantee that the dead will be found, identified, and returned to the people who loved them.

The missing soldiers of World War I are not an unfinished footnote. They are part of the final accounting.

More than 700,000 servicemen went into that war and still have no identified resting place.

That is the cost of war.

References

American Battle Monuments Commission. (2023, May 31). WWI unknown soldier’s remains unearthed after more than a century to be laid to rest at Oise-Aisne American Cemetery.

Commonwealth War Graves Commission. (n.d.). Finding and reburying our war dead.

Commonwealth War Graves Commission. (2026a, May 4). The Thiepval Memorial: 72,311 names and why it matters.

Commonwealth War Graves Commission. (2026b). How to research British Army casualties of the First World War.

Le Monde. (2024, November 11). Every year, dozens of WWI soldiers’ bodies are found in northern France.

Meucci, M., et al. (2022). The skeletal remains of soldiers from the two world wars: Between forensic anthropology and identification. Forensic Sciences Research.

Van der Auwera, F. (2022, April 22). How missing soldiers regain their identity. The Low Countries.

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This essay is written by Cliff Potts, Editor-in-Chief of WPS News. WPS News has been active in one form or another on the internet since 1998; for more information, visit https://cliffpotts.org.