Argentina needed to beat Peru by four goals in the second group stage to qualify for the final ahead of Brazil. They won 6-0 a result that remains one of football's most disputed. Mario Kempes was the tournament's driving force, scoring six goals with a relentless forward energy. César Luis Menotti's expansive style gave the squad a philosophy that transcended the regime it played under.

The Netherlands, without Cruyff, forced extra time. Kempes scored twice once in normal time and a magnificent individual effort in extra time, surging past defenders before finishing. Daniel Bertoni added a third. Ticker-tape confetti fell from every level of the Monumental. Argentina won 3-1. The stadium and streets erupted. The political context would haunt the celebrations, but the football was undeniable.

Johan Cruyff, the best player of his generation, refused to travel for reasons he would keep private for decades. The Netherlands arrived without their talisman. Argentina, the host, had the weight of a regime on their shoulders.

Argentina's military junta, which had seized power in 1976, intended to use the World Cup as a tool of legitimacy. The regime's Dirty War had disappeared tens of thousands of political opponents, some held in detention centres within earshot of the stadiums. International human rights groups called for a boycott. No team withdrew.

Buenos Aires, Rosario, Córdoba, Mendoza, and Mar del Plata hosted matches. Buenos Aires, the capital, dominated with multiple venues. Rosario, Argentina's second city, and Córdoba, the university town, provided strong footballing traditions. Mendoza, in the Andean foothills, and the coastal resort of Mar del Plata added geographic diversity. Teams were based in hotels selected by the military government.

The junta invested heavily in host city infrastructure, including roads, telecommunications, and broadcasting facilities. The economic outlay was significant for a country under financial strain. International media attention was a double-edged sword: it brought scrutiny of the regime alongside tourism revenue. The stadium investments benefited Argentine club football for years afterward, but the political cost of the tournament's association with dictatorship was lasting.

Mario Kempes was the tournament's outstanding player six goals, flowing hair, and a relentless forward drive that carried Argentina. Rob Rensenbrink came within inches of winning it for the Netherlands in the final, his shot hitting the post in the dying seconds. Teófilo Cubillas scored twice in Peru's upset of Scotland with goals of stunning technical quality.

Archie Gemmill's wonder goal against the Netherlands a slalom through three defenders is Scotland's greatest ever World Cup moment, rendered bittersweet by their subsequent elimination. Kempes's extra-time surge through Dutch defenders in the final was unstoppable. The ticker-tape confetti at the Monumental became the tournament's visual signature. Rensenbrink's post remains one of football's great what-ifs.