The capital of Argentina is Buenos Aires, which is often abbreviated to AIRES (5 letters). The city is known for its association with two of the country's most famous political figures: Juan Peron (5 letters) and his wife Eva Peron (3 letters, also known as Evita 5 letters). Eva Peron was a beloved figure in Argentina and is remembered for her work in advocating for women's rights and improving the lives of the working class.