Prabowo Subianto was inaugurated Sunday as the eighth president of the world’s most populous Muslim-majority nation, completing his journey from an ex-general accused of rights abuses during the dark days of Indonesia’s military dictatorship to the presidential palace.

The former defense minister, who turned 73 on Thursday, was cheered through the streets by thousands of waving supporters after taking his oath on the Quran in front of lawmakers and foreign dignitaries. Banners and billboards filled the streets of the capital, Jakarta, where tens of thousands gathered for festivities.

Wearing a blue Betawi traditional cloth and a dark baseball cap, Subianto stood up in the sunroof of a white van and waved, occasionally shaking people’s hands, as his motorcade struggled to pass through the thousands of supporters calling his name and chanting “Good luck Prabowo-Gibran,” filling the road leading from the parliament building to the presidential palace.

“I see a firm and patriotic figure in him,” said Atalaric Eka Prayoga, 25. “That’s a figure we need to lead Indonesia.”

Another resident, Silky Putri, said he hopes Subianto “can build Indonesia to be more advanced and improve the current gloomy economic situation.”

Subianto was a longtime rival of the immensely popular President Joko Widodo, who ran against him for the presidency twice and refused to accept his defeat on both occasions, in 2014 and 2019.

But Widodo appointed Subianto as defense chief after his reelection, paving the way for an alliance despite their rival political parties. During the campaign, Subianto ran as the popular outgoing president’s heir, vowing to continue signature policies like the construction of a multibillion-dollar new capital city and limits on exporting raw materials intended to boost domestic industry.

Subianto was sworn in with his new vice president, 37-year-old Surakarta ex-Mayor Gibran Rakabuming Raka. He chose Raka, who is Widodo’s son, as his running mate, with Widodo favoring Subianto over the candidate of his own former party. The former rivals became tacit allies, even though Indonesian presidents don’t typically endorse candidates.

But how he’ll govern the biggest economy in Southeast Asia — where nearly 90% of Indonesia’s 282 million people are Muslims — remains uncertain after a campaign in which he made few concrete promises besides continuity with the popular former president.

After decades of dictatorship under President Suharto, Indonesia was convulsed by political, ethnic and religious unrest in the late 1990s and early 2000s. Since then, it has consolidated its democratic transition as the world’s third-largest democracy, and is home to a rapidly expanding middle class.

Subianto, who comes from one of the country’s wealthiest families, is a sharp contrast to Widodo, the first Indonesian president to emerge from outside the political and military elite.

Backed by Widodo, Subianto swept to a landslide victory in February’s direct presidential election on promises of policy continuity.