Robert Poos, 78, who covered the Vietnam War as a reporter for the Associated Press and later was managing editor of Soldier of Fortune magazine, died Monday at a hospice in Arlington, Va., of respiratory ailments and a broken hip.

A Marine during the Korean War, Mr. Poos joined the AP in 1957. Assigned to the Saigon bureau in 1965, he quickly became noted for aggressive and daring combat reporting. He later held AP posts in Malaysia, Tokyo and Washington. After leaving the AP in 1970, he was a spokesman for the American Railroad Association.

Later, as managing editor of Soldier of Fortune in the 1980s, he wrote about military topics. Editor and publisher Robert K. Brown said that as the magazine's "first professional" journalist, Mr. Poos brought expertise and real experience to its readers.

- AP