An illustration of a soldier charging through an abatis. Abatis, abattis, or abbattis (a French word meaning a heap of material thrown) is a term in field fortification for an obstacle formed of the branches of trees laid in a row, with the sharpened tops directed outwards, towards the enemy.
Coffin, Charles Carleton The Boys of '61; of, Four Years of Fighting. Personal Observation with the Army and Navy (Boston, MA: Estes and Lauriat, 1884)
Courtesy the private collection of Roy Winkelman