Censorship during the Mexican-American War
Censorship during the Mexican-American War (1846-1848) was notably minimal, marking a significant shift in how wars were reported in the United States. As the first American conflict extensively covered in newspapers, the war captured the attention of the public, who eagerly consumed daily updates from the front lines. This era saw the emergence of war correspondents, who provided firsthand accounts that proved to be more timely and accurate than official military reports. The absence of government and military censorship allowed for a wide range of perspectives, including dissenting views against the war, particularly from radical Whigs. This openness enabled the American public to form more informed opinions about the conflict and its implications. Concerns about the potential for negative reporting to sway public sentiment or expose sensitive information to the enemy were present, yet authorities did not impose restrictions on journalistic freedom. The lack of censorship during this war stands in contrast to later conflicts, reflecting a unique moment in American media history.
Censorship during the Mexican-American War
Date: 1846-1848
Place: Mexico
Significance: Issues arising from the lack of censorship during the Mexican-American War influenced later U.S. government wartime censorship
The Mexican-American War was the first American war reported daily in newspapers across the country. The American public followed the conflict with great interest and anticipation. Newspaper reports did more to influence American attitudes toward the war than any other medium. They also molded American perceptions of the war, its causes, and its effects on the United States. Remarkably, government and military censorship of newspaper reports did not exist.

Newspapers used war correspondents for the first time to report from the front lines in Mexico and the Southwest. These reporters followed the campaigning American armies and occasionally participated in the fighting. Instead of rehashing often late and nondescript military dispatches, reporters wrote firsthand accounts that fed the American public’s desire to know more about the war. War correspondents rapidly and efficiently wrote their stories and sent them off to press. Their stories proved not only more plentiful but also more accurate than their military counterparts. No military or government authority censored their stories. Although some in military and government circles complained about the lack of censorship, the large audience reached by the newspapers had a positive effect. The journalistic freedom exercised by newspapers provided Americans more information about this war than previous ones. Thus, the American people may have been better able to form informed, intelligent opinions about the conflict.
Dissident opinion against the war also enjoyed widespread freedom. The government did not attempt to silence those who spoke out against “Mr. Polk’s war”—namely, radical Whigs. President James K. Polk publicly complained about opposition to the war, but charges of treason for opposing the war rarely occurred. Authorities did not constrain civil liberties. The Polk Administration worried that dissident opinion might affect the prosecution of the war, but not to the point of taking drastic measures to curb opposition. While the war was not without controversy over which side started the conflict and what motivated the United States in the war, censorship had yet to become standard practice. War correspondents informed the American public. Sketch artists, so prevalent in the American Civil War, provided uncensored visual depictions of battles to American readers. This freedom caused concern, notably among the military, who worried that reporters might unintentionally leak secret information to the enemy, and that negative reporting might turn public opinion against military action. Journalistic freedom and dissident opinion did not enjoy such freedom in later conflicts.