A Congolese was killed in Kibumba . A U.N. mission is joining the Tanzanian army in fighting Congolese rebels . The eastern region of the vast country has been a bloody battleground for the past year .
A Tanzanian was killed in the Democratic Republic of the Congo . A U.N. mission is joining the Congolese army in fighting M23 rebels . The eastern region of the vast country has been a bloody battleground for years .