Zacks and London said the piracy and extortion amounted to a Muslim war against Christian nations. Ignoring the religious undertones, London said, is being dishonest with history.
"It's a little bit ludicrous to say religion doesn't enter into it if everyone at the time understood religion was a factor," London said.
But no one stood up to the piracy until Yusuf Karamanli, the bashaw, or ruler, of Tripoli issued an ultimatum in 1801 to the fledgling U.S. government and its new president, Thomas Jefferson. Unless the U.S. paid him a cash tribute, Karamanli said, he'd declare war.
To underscore his demand, Karamanli had the captured crew of a U.S. frigate, the U.S.S. Philadelphia, sold into slavery.
Jefferson had long wanted to do something to stop the piracy in the Mediterranean. "Jefferson took up the idea that we should fight the pirates and do whatever we could to fight them rather than seek accommodation or buy them off," London said.
Eaton, a Revolutionary War veteran and former diplomat in Tripoli, proposed using military force to depose Karamanli and install the ruler's exiled brother, Hamet, as the new monarch. Jefferson and his cabinet approved Eaton's plan.
Eaton was chosen to lead the mission because he was a skilled and disciplined military commander. But he was blunt and unyielding in his personal beliefs about right and wrong. He also was totally inept at politics and prone to outbursts of self-righteous recklessness.
"Eaton was able to convince Jefferson that the mission was worth a shot and that it could be done cheaply," London said. "But almost from the moment he gave Eaton the green light, he started to have his own doubts about it."
Jefferson didn't bother notifying Congress of the decision to send a military force to the Mediterranean until the expedition was well underway and beyond recall.
"It was much easier for Jefferson to break the news of things when it was impossible to prevent them from happening," London said.
Zacks says Eaton was "obsessed" with accomplishing the mission. In addition to his contingent of eight U.S. Marines, he recruited an unlikely force of European mercenaries and disaffected Arab fighters.
Eaton overcame odds that might have stopped a saner man, Zacks said. He led a march across a trackless desert without a map or local guides to the Tripoli city of Derne, where in April 1805 he confronted a force much larger than his.
His strategy was to lead a charge straight into his enemy's guns and, with the aid of U.S. Navy gunboats offshore, capture the city. When Eaton's Marines flew the Stars and Stripes at Derne, it was the first time a U.S. flag had been raised in conquest in a foreign land.
"If Eaton hadn't been such a madman, his mission wouldn't have worked out so well," Zacks said.
Eaton wanted to continue his campaign after capturing Derne. But by then the U.S. had signed a treaty with Karamanli that ended the piracy and slavery and voided Eaton's agreement to install the exiled royal sibling Hamet on the throne.
Unknown to Eaton, Jefferson had authorized U.S. diplomat Tobias Lear to negotiate the settlement at the same time Eaton was undertaking his daring and dangerous mission. It was the president's way of hedging his bets.
Jefferson figured "that whichever effort proved successful first, [he] would still be able to claim victory," London said.
Eaton sailed home depressed and angry that he'd been deprived of the opportunity to carry out his full mission and win a clear military victory.
He was astonished to learn that U.S. newspapers were hailing him as a hero of the young nation. Congress approved paying him $12,000 (U.S.) to pay off debts he'd accumulated.
But Eaton's demons got the better of him. He couldn't keep quiet about Jefferson undercutting his mission, and the money disappeared into heavy drinking and gambling. He died in 1811 at the age of 47.
In the end, Zacks said, Eaton's most difficult opponent was himself.
"It all would have been great if he'd been a team player," Zacks said. "But he couldn't do it. He had to criticize relentlessly."
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