INTERVAL. In military affairs, the lateral space between works or bodies of troops, as distinguished from distance, which is the depth or measurement in a direction from front to rear.
IN THE WIND. The state of a vessel when thrown with her head into the wind, but not quite all in the wind (see [All]). It is figuratively used for being nearly intoxicated.
INTRENCHMENT. Any work made to fortify a post against an enemy, but usually implying a ditch or trench, with a parapet.
INUNDATIONS. In ancient Egypt officers estimated the case of sufferers from the inundations of the Nile. The changes of property in Bengal, by alluvion, are equally attended to. Inundation is also a method of impeding the approach of an enemy, by damming up the course of a brook or river, so as to intercept the water, and set the neighbourhood afloat. In Egypt the plan was diametrically opposite; for by flooding Lake Mareotis, our gunboats were enabled greatly to annoy the French garrison at Alexandria.
INVALID. A maimed or sick soldier or sailor.—To invalid is to cause to retire from active service from inability.
INVER. A Gaelic name, still retained in Scotland, for the month of a river.
INVESTMENT. The first process of a siege, in taking measures to seize all the avenues, blocking up the garrison, and preventing relief getting into the place before the arrival of the main army with the siege-train.
INVINCIBLE. A name boastfully applied both to naval and military forces, which have nevertheless been utterly vanquished.
INVOICE. An account from a merchant to his factor, containing the particulars and prices of each parcel of goods in the cargo, with the amount of the freight, duties, and other charges thereon.
INWARD. The opposite of [outward] (which see).