In 1977, a nationwide student demonstration against the government disrupted Sierra Leone politics. The demonstration was quickly put down by the army and Stevens' own personal Special Security Division (SSD), a heavily armed paramilitary force he had created to protect him and maintain his hold on power. SSD officers were loyal to Stevens and were deployed across the country to clamp down on any rebellion or protest against Stevens' government. A general election was called later that year in which corruption was again endemic; the APC won 74 seats and the SLPP 15. In 1978, the APC-dominant parliament approved a new constitution making the country a one-party state. The 1978 constitution made the APC the only legal political party in Sierra Leone. This move led to another major demonstration against the government in many parts of the country, but it was also put down by the army and Stevens' SSD force.