The sharp sound of glass breaking under a rubber boot echoes over the rooftop like the crack of gunfire, as Thérèse Ndarubyariye leans forward in her chair. Her mouth is set in a thin, determined line and she speaks in a voice no louder than a whisper.

Ndarubyariye, who is using a pseudo-nym for her protection, is a soldier with the Alliance of Patriots for a Free and Sovereign Congo (APCLS), just one of the 120 armed groups battling in the east of the Democratic Republic of Congo (DRC). ‘I joined to protect my country,’ she says simply.