In military usage, a barrage is massed sustained artillery fire aimed at a series of points along a line. As well as attacking any enemy in that line, a barrage intends to suppress enemy movement and actions through that line. The points along the line may be 20–30 yards (meters) apart, with the total line length anything from a few hundred to several thousand yards (meters) long. Barrages can consist of multiple such lines, usually about 100 yards (meters) apart, with the barrage shifting from one line to the next over time, or several lines may be targeted simultaneously. A barrage may involve a few or many artillery batteries, or even (rarely) a single gun. Typically each gun in a barrage, using indirect fire, will fire continuously at a steady rate at its assigned point for an assigned