Later that year , he travelled to Mozambique and joined the FRELIMO rebels who were fighting for the liberation of Mozambique from Portugal 's colonial power .
It was at this point that he began calling himself Fred Rwigema .
Later that year , Fred Rwigema travelled to Mozambique and joined the FRELIMO rebels who were fighting for the liberation of Mozambique from Portugal 's colonial power .
It was at this point that he began calling himself Fred Rwigema .