"He belonged to that army known as invincible in peace, invisible in war"

This quote by William Tecumseh Sherman is describing the United States Army. It is a metaphor for the concept that the Army is strong and powerful in times of peace, however is hardly ever seen in times of war. The Army is invincible in peace because it is well-trained and well-equipped to protect the country and its citizens. However, in times of war, the Army is undetectable since it is often deployed to far-off locations and is not seen by the public. This quote is a suggestion of the importance of the United States Army and its function in protecting the country and its citizens. It is also a pointer of the sacrifices that the men and females of the Army make in order to keep the country safe.