Shehu Usman Aliyu Shagari, Turakin Sakkwato (born February 25, 1925,) served as the President of Nigeria's Second Republic (1979–1983), after the handover of power by General Olusegun Obasanjo's military government.

Shagari is a northerner of Fulani extraction and holds the aristocratic title of Turakin Sakkwato in the Sokoto Caliphate. He worked as a teacher for a brief period before entering politics in 1954 upon his election to the federal House of Representatives.

Shehu Usman Shagari was born in Shagari village to the family of Magaji Aliyu and Mariamu in 1925. His name, Usman, means "Companion". He was raised in a polygamous family, and was the sixth child born into the family. Prior to becoming Magajin Shagari, Aliyu, Shehu's father was a farmer, trader and herder. However, due to traditional rites that prevented rulers from participating in business, Aliyu relinquished some of his trading interest when he became the Magaji, or village head, of Shagari village. Aliyu died five years after Shehu's birth, and Shehu's elder brother, Bello, briefly took on his father's mantle as Magajin Shagari.

Elizabeth II (Elizabeth Alexandra Mary; born 21 April 1926) is the constitutional monarch of 16 sovereign states known as the Commonwealth realms, and head of the 54-member Commonwealth of Nations. She is also head of state of the Crown Dependencies.

Elizabeth was born in London, and educated privately at home. Her father acceded to the throne as George VI in 1936 on the abdication of his brother Edward VIII. She began to undertake public duties during the Second World War, in which she served in the Auxiliary Territorial Service. On the death of her father in 1952, she became Head of the Commonwealth and queen regnant of seven independent Commonwealth countries: the United Kingdom, Canada, Australia, New Zealand, South Africa, Pakistan, and Ceylon. Her coronation service in 1953 was the first to be televised. Between 1956 and 1992, the number of her realms varied as territories gained independence and some realms became republics. Today, in addition to the first four aforementioned countries, Elizabeth is Queen of Jamaica, Barbados, the Bahamas, Grenada, Papua New Guinea, the Solomon Islands, Tuvalu, Saint Lucia, Saint Vincent and the Grenadines, Belize, Antigua and Barbuda, and Saint Kitts and Nevis.

Umaru Dikko (born 1936, Wamba) is a Nigerian politician and was a trusted adviser to President Shehu Shagari. He was also the Nigerian minister for Transportation from 1979-1983.

He started playing a role in the nation's governance in 1967, when he was appointed as a commissioner in the then North Central State of Nigeria (now Kaduna State). He was also secretary of a committee set up by General Hassan Katsina to unite the Northerners after a coup in 1966. In 1979, he was made Shagari's campaign manager for the successful presidential campaign of the National Party of Nigeria. During the nation's Second Republic, he played prominent roles as transport minister and head of the presidential task force on rice.

A coup on December 31, 1983 overthrew the government of Shagari. Dikko fled into exile in London with a few other party officials.

On July 5, 1984, he played the central role in the Dikko Affair; he was found drugged in a crate labeled Diplomatic Baggage at Stansted Airport, an apparent victim of a government (Israeli) sanctioned, but aborted kidnapping. The crate's destination was Lagos.