July 11 in Military History — On This Day

Battle of Oudenarde

In Marlborough's most tactically complex victory, Allied forces caught the French army while it was still crossing the Scheldt River and fought an improvised battle that evolved into an encirclement. Marlborough's left wing engaged the French while Eugene raced cavalry around the French flank. By nightfall, nearly 25,000 French troops were cut off in the encirclement — though darkness allowed many to escape.

Oudenarde opened the way for the Siege of Lille and demonstrated Marlborough's extraordinary ability to fight a major battle without a formal plan, reacting to events with intuitive brilliance. The French command was paralyzed by feuding between the talented Vendôme and the royal but incompetent Duke of Burgundy.

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⚔️📍 Philadelphia, Pennsylvania1798

U.S. Marine Corps Established by Congress

President John Adams signed legislation reestablishing the United States Marine Corps as a separate military branch, following its dissolution after the Revolutionary War. The Marines were needed for service aboard naval vessels in the Quasi-War with France.

The Marine Corps would go on to fight in every major American conflict and become famous for amphibious assault operations, particularly in the Pacific War.

Outcome

USMC established; has served in every American conflict since

The Secession of Katanga

As chaos spread, the rich southern province of Katanga — source of most of the Congo's mineral wealth — declared independence under Moïse Tshombe, backed by Belgian officials, the mining giant Union Minière, and white mercenaries. The wealthiest region had broken away, taking with it the revenues on which the whole country depended.

Katanga's secession, with its Belgian and corporate backing, was the central wound of the crisis. It gutted the new state's finances, entangled the Cold War powers, and prompted Lumumba's fateful appeal to the UN — and then, when the UN would not crush it, to the Soviet Union.

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Srebrenica Massacre

On July 11, 1995, Bosnian Serb Army forces under General Ratko Mladić overran the UN-declared 'safe area' of Srebrenica, protected by a Dutch UNPROFOR battalion that numbered roughly 400 lightly armed soldiers. Mladić appeared before cameras promising the women and children they would be safe. Over the next seven days, his forces separated approximately 8,000 Bosniak men and boys from the refugee columns seeking safety at a nearby UN base, transported them to sites across eastern Bosnia, and executed them in the worst act of genocide in Europe since the Nazi Holocaust. The Dutch UN soldiers were powerless — or unwilling — to intervene. The victims' bodies were buried in mass graves, then exhumed and moved to secondary and tertiary graves in an attempt to hide the evidence.

Srebrenica is the defining moral catastrophe of the Yugoslav Wars and of post-Cold War European history. The massacre legally established the term 'genocide' for a European atrocity for the first time since the Nuremberg trials, confirmed by both the ICTY and the International Court of Justice. The failure of the UN 'safe areas' policy destroyed the credibility of traditional peacekeeping and was the direct catalyst for Operation Deliberate Force — the NATO bombing campaign that finally brought the Bosnian Serbs to the negotiating table.

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