Photograph of military mail censors at work
An unidentified group of American military censors at work in an unidentified location during the First World War. During this conflict, the US military began its first large-scale censorship of troop mail. Censors were on the alert for anything that might aid the enemy. References that were almost certain to be cut or blacked out were those to troop locations and movements.
National Postal Museum, Curatorial Photographic Collection