Cape Verde have become the second-smallest nation to reach the World Cup after the islanders beat Eswatini 3-0 at home.
Victory meant the Blue Sharks secured top spot in their qualifying group and a place at the 2026 finals ahead of continental heavyweights Cameroon.
Dailon Livramento opened the scoring for the hosts in Praia, turning home a loose ball inside the six-yard box early in the second half, and Willy Semedo volleyed in a second soon afterwards.
Veteran defender Stopira added the third in stoppage time before the full-time whistle sparked joyous scenes of celebration at the 15,000-capacity National Stadium.
An archipelago of 10 islands in the Atlantic Ocean, with a population of just under 525,000 according to the latest figures from the World Bank, Cape Verde gained independence from Portugal in 1975 and first attempted to reach the 2002 World Cup hosted in Japan and South Korea.
The team have punched above their weight in the Africa Cup of Nations (Afcon) in recent years, reaching the quarter-finals on debut in 2013 and again in 2023, and currently sit 70th in the world rankings.
Iceland, who featured at the 2018 World Cup in Russia, is the only country with a smaller population to qualify for the global showpiece.
Last month's 1-0 home win over Cameroon in the capital city put the islanders in pole position in Group D, knowing one victory from their remaining two games would book their place in Canada, Mexico and the United States.
The Blue Sharks missed their first chance to qualify last Wednesday against Libya when they drew 3-3, fighting back from two goals down in Tripoli before being denied an almost certain stoppage-time winner by a controversial offside call.
But the Cape Verdeans made sure of their second opportunity in Praia against winless Eswatini, becoming the sixth African side to book a ticket to next year's finals.
Cape Verde President Jose Maria Neves was in attendance as the home crowd endured a nervy first period in which Livramento sent an effort wide and Jamiro Monteiro was denied by Eswatini goalkeeper Khanyakwezwe Shabalala.
But the tension lifted as soon as Livramento broke the deadlock three minutes into the second half, prompting passionate celebrations with the crowd which were repeated when Semedo converted Diney's knockdown.
Centre-back Roberto 'Pico' Lopes says the fact Africa now has a guaranteed nine slots at the expanded 48-team World Cup - up from five at Qatar 2022 - has benefitted the Blue Sharks.
"Traditionally, it's been difficult to qualify for the World Cup, especially in Africa where you had to finish first [in your group] to have a chance," Lopes told the BBC before the trip to Libya.
"This time, if you finish first, you're in.
"The motivation to be first and hold on to that has been crucial."
Five-time Afcon winners Cameroon, meanwhile, have paid the price for poor away performances over the course of a campaign which began in November 2023.
The Indomitable Lions drew matches in Libya, Angola and against Eswatini, and will now need to navigate both African and inter-confederation play-offs if they are to extend their continental record of eight appearances at the World Cup.
