In whose regime was illegal West Africa aliens living in Nigeria expelled?

Illegal West Africa aliens living in Nigeria were expelled during the Buhari/Idiagbon era. In 1983, General Muhammadu Buhari became the military head of state of Nigeria after a military coup. He appointed Major-General Tunde Idiagbon as his deputy. During their regime, a policy was put in place to expel illegal immigrants who were mostly from West Africa, particularly Ghana. The policy was known as the "Aliens Compliance Order" and it gave illegal immigrants a two-week ultimatum to leave the country or face deportation. The policy was part of the government's effort to tackle economic challenges, including high unemployment and a shortage of resources, which were exacerbated by the presence of illegal immigrants. The government also believed that illegal immigrants were responsible for criminal activities and other social problems in the country. As a result of the policy, an estimated two million immigrants, mostly Ghanaians, were forced to leave Nigeria. The move was widely criticized by the international community and human rights groups, who accused the government of violating the rights of the immigrants. However, the Buhari/Idiagbon regime defended the policy, arguing that it was necessary to protect the interests of Nigerians and maintain law and order in the country.