The SMS Panther was not much of a warship. A small gunboat displacing under 1,000 tons, she carried two 10.5-centimeter guns and a crew that could fit in a large restaurant. But on the morning of July 1, 1911, when she dropped anchor in the harbour at Agadir on Morocco's Atlantic coast, she carried something far more powerful than ammunition: a message.

Germany was done being ignored.

Kiderlen's Gamble

The man behind the Panther's voyage was Alfred von Kiderlen-Waechter, Germany's Foreign Secretary, a shrewd Swabian diplomat who liked his wine and disliked France's quiet absorption of Morocco. France had been steadily turning the country into a protectorate — sending troops to Fez in April, signing agreements with local rulers — and Kiderlen believed Germany deserved compensation. Not Morocco itself. He knew that was a lost cause. He wanted the French Congo: its rubber, its ivory, its strategic corridor linking German colonies in West Africa to East Africa.

His plan was elegant. Park a gunboat at Agadir. Let the newspapers scream. Wait for Paris to come to the negotiating table with something worth taking. The Kaiser approved. Kiderlen was so confident he told Berlin only one ship was needed.

There was just one complication. Germany needed a pretext — a German citizen in Agadir whose "safety" required naval protection. They found one: a merchant named Hermann Wilberg, who was dispatched south to Agadir from 110 kilometres away. He arrived three days after the Panther did. The gunboat was protecting a man who wasn't there yet.

The Bluff Gets Called

For two weeks, the gambit seemed to work. Paris was nervous. Negotiations opened. Kiderlen demanded the entire French Congo.

Then Britain intervened.

On July 21, David Lloyd George — the Chancellor of the Exchequer, not the Foreign Secretary, which made the provocation more pointed — stood up at London's Mansion House and delivered a sentence that changed the crisis. If Britain were treated, he said, "as if she is of no account in the cabinet of nations, then I say emphatically that peace at that price would be a humiliation intolerable for a great country like ours to endure."

He never said the word "Germany." He didn't need to.

The speech was coordinated with the Prime Minister and Foreign Secretary. It was a calculated signal: Britain would back France. The gunboat bluff had been called.

The Retreat

Germany negotiated for four more months, but the leverage was gone. The final deal, signed on November 4, 1911, gave France its Moroccan protectorate. Germany received two strips of territory in the Congo — marshy, malarial, and, as one German newspaper put it, land that "nobody wanted."

Kiderlen-Waechter was ridiculed in the German press. The hawks in Berlin — particularly Admiral Alfred von Tirpitz, who had wanted a more aggressive approach — used the humiliation to argue for a massive naval build-up. The Agadir Crisis didn't start a war. It did something worse: it convinced every major European power that the next crisis would.

The French took away the lesson that German ultimatums were bluffs. The Germans took away the lesson that next time, they couldn't afford to bluff. Three years later, those two lessons collided at Sarajevo.

The Echo

Tomorrow evening, the latest in a series of American ultimatums to Iran expires. President Trump has set an 8 P.M. Eastern deadline for Iran to reopen the Strait of Hormuz, threatening to destroy power plants and bridges if Tehran refuses. It is at least the third such deadline since the conflict began on February 28 — the original 48-hour demand on March 21 was extended twice before landing on April 7 as a firm date.

Iran remains defiant. Tehran says the strait stays closed until it receives compensation for war damages, and that it has "formulated its response" to ceasefire proposals from Pakistan, Egypt, and Turkey. Meanwhile, Brent crude hovers around $111 per barrel, and the IEA has warned that April's oil supply crunch will be worse than March's.

The structural parallel to Agadir is the serial deadline — a threat repeated enough times that it becomes its own kind of signal. Supporters of the administration's approach argue that escalating pressure is the only language Tehran understands, that previous presidents' restraint enabled decades of Iranian aggression, and that the credible threat of infrastructure strikes is precisely what brought Iran to the negotiating table via intermediaries. Critics counter that each extended deadline without follow-through risks the "Agadir trap" — diminishing the credibility of future threats while hardening the adversary's resolve.

Both sides cite historical precedent. Both have data. The honest answer is that nobody knows which pattern this follows until the deadline passes.

Kiderlen-Waechter thought he knew too. He was certain the Panther would bring Paris running. He was right about that. He was wrong about everything that happened next.

The trouble with ultimatums is that the clock runs out for both sides.