Nii Amaa Ollennu holds a unique place in Ghana’s history as the only president who served for just 24 days. He became the country’s president on April 27, 1966, after a military coup ousted Ghana's first president, Dr. Kwame Nkrumah. The coup was led by the National Liberation Council (NLC), a group of military officers and police, who accused Dr. Nkrumah of being a dictator.

After the coup, the NLC took over and set up a new government, with Nii Amaa Ollennu becoming the head of state. Nii Amaa Ollennu was not a military officer but a respected lawyer and academic who was chosen by the NLC to be a figurehead. His role as president was mainly symbolic, and the actual power was in the hands of the military leaders who had carried out the coup.

Nii Amaa Ollennu’s presidency was short, lasting only 24 days, and his time in office was mainly focused on helping to transition the country from Nkrumah’s government to the military-led regime. However, his time as president was important because he was the first person to hold the title after Nkrumah was overthrown. Nii Amaa Ollennu was also known for his deep commitment to Ghana's legal system and his contributions to law and education.



On May 24, 1966, Nii Amaa Ollennu resigned as president, and the NLC handed over power to Colonel Joseph Arthur Ankrah, who became the chairman of the NLC and effectively took over the leadership of Ghana.

Nii Amaa Ollennu's presidency may have been brief, but it is significant in Ghana's political history. He is remembered for his role in a difficult time in the country’s development and for being a calm and respected figure during a period of uncertainty and change.