overmarching

In that fearful "change of base" which resulted in the seven days 'battle on the peninsula, when from the combined influence of marsh malaria, want of food, overmarching, the heat and fatigue of constant fighting, and the depression of spirits incident to the unexpected retreat, more of our men fell down with mortal sickness than were slain or wounded in the battles, one of Mrs. Husband's sons was among the sufferers from disease, and word was sent to her that he was at the point of death.

Woman's Work in the Civil War A Record of Heroism, Patriotism, and Patience Mary C. Vaughan