Participated in a 1992 military coup
When he was in his late 20s, Bio was part of a group of soldiers who overthrew the government in 1992 after nearly 20 years of one-party rule in the country. Alongside a group of young soldiers including Captain Valentine Strasser, Lieutenant Sahr Sandy, and Lieutenant Solomon Musa, Bio overthrew the All People’s Congress (APC) government of President Joseph Saidu Momoh in a bloodless coup. The young soldiers formed the National Provisional Ruling Council (NPRC) with Strasser as their leader and Head of State of Sierra Leone. They ruled from 1992 to 1996. Bio later became deputy head of state from 1994 to January 1996.