MIAMI — Former President Fidel Castro, who led a rebel army to improbable victory in Cuba, embraced Soviet-style communism and defied the power of 10 U.S. presidents during his half-century rule, has died at age 90.

With a shaking voice, President Raul Castro said on state television that his older brother died at 10:29 p.m. Friday. He ended the announcement by shouting the revolutionary slogan: “Toward victory, always!”

Castro’s reign over the island-nation 90 miles from Florida was marked by the U.S.-backed Bay of Pigs invasion in 1961 and the Cuban Missile Crisis a year later that brought the world to the brink of nuclear war. The bearded revolutionary, who survived a crippling U.S. trade embargo as well as dozens, possibly hundreds, of assassination plots, died 10 years after ill health forced him to hand power over to Raul.

Castro overcame imprisonment at the hands of dictator Fulgencio Batista, exile in Mexico and a disastrous start to his rebellion before triumphantly riding into Havana in January 1959 to become, at age 32, the youngest leader in Latin America.

His commitment to socialism was unwavering, though his power finally began to fade in mid-2006 when an ailment forced him to hand over the presidency to Raul in 2008, provisionally at first and then permanently. His defiant image lingered long after he gave up his trademark Cohiba cigars for health reasons and his tall frame grew stooped.

“Socialism or death” remained Castro’s rallying cry even as Western-style democracy swept the globe, leaving this island of 11 million people an economically crippled Marxist curiosity.

He survived long enough to see Raul Castro negotiate an opening with U.S. President Barack Obama on Dec. 17, 2014, when Washington and Havana announced they would move to restore diplomatic ties. He cautiously blessed the deal with his lifelong enemy.

Castro was born Aug. 13, 1926, in eastern Cuba’s sugar country, where his Spanish immigrant father worked first recruiting labor for U.S. sugar companies and later built up a prosperous plantation of his own.

Castro attended Jesuit schools, then the University of Havana, where he received law and social science degrees. His life as a rebel began in 1953 with a reckless attack on the Moncada military barracks. Most of his comrades were killed and Fidel and his brother Raul went to prison.

Fidel turned his trial defense into a manifesto that he smuggled out of jail, famously declaring, “History will absolve me.”

Freed under a pardon, Castro fled to Mexico and organized a rebel band that returned in 1956.

Three years later, tens of thousands spilled into the streets of Havana to celebrate Batista’s downfall and catch a glimpse of Castro as his rebel caravan arrived in the capital on Jan. 8, 1959.

Within months, Castro was imposing radical economic reforms.

In 1964, Castro acknowledged holding 15,000 political prisoners. Hundreds of thousands of Cubans fled, including Castro’s daughter Alina Fernandez Revuelta and his younger sister Juana.

Still, the revolution thrilled millions in Cuba and across Latin America who saw it as an example of how the seemingly arrogant Yankees could be defied. And many on the island were happy to see the seizure of property of the landed class, the expulsion of American gangsters and the closure of their casinos.

The American government imposed a trade embargo, banning virtually all U.S. exports to the island except for food and medicine, and it severed diplomatic ties on Jan. 3, 1961.

On April 16 of that year, Castro declared his revolution to be socialist, and the next day, about 1,400 Cuban exiles stormed the beach at the Bay of Pigs on Cuba’s south coast. But the CIA-backed invasion failed.

The biggest crisis of the Cold War between Washington and Moscow exploded on Oct. 22, 1962, when President John F. Kennedy announced there were Soviet nuclear missiles in Cuba and imposed a naval blockade of the island. Humankind held its breath, and after a tense week of diplomacy, Soviet leader Nikita Krushchev removed them. Never had the world felt so close to nuclear war.