Flanks of a Frontier. Are certain salient points in a national boundary, strong by nature and art, and ordinarily projecting somewhat beyond the general line. The effect of these flanks is to protect the whole frontier against an enemy, as he dare not penetrate between, with the risk of their garrisons, reinforced from their own territories, attacking his rear, and cutting off communication between him and his base.

Flash. The flame which issues from any fire-arm or piece of ordnance on its being fired.

Flash in the Pan. An explosion of gunpowder without any communication beyond the vent. When a piece is loaded, and, upon the trigger being drawn, nothing but the priming takes fire, that piece is said to flash in the pan.

Flask, Powder-. A measure formerly made of horn, used to carry powder in, with the measure of the charge of the piece on the top of it.

Flathead Indians. A tribe of aborigines, so called from the practice which prevailed among them of binding some solid substance on the foreheads of their children so as to cause a depression of the skull. They are located on an agency in Montana. See [Indians and their Agencies].

Flaw. A crack or small opening in a gun or its carriage is so called.

Fleau d’Armes (Fr.). An ancient offensive weapon; the part used for striking was armed with sharp iron spikes.

Flèche. Literally an arrow; but applied in fortification to a work resembling a redan, except that it is raised upon the terre-plein without a ditch. It is in short a field-work, having faces and small flanks hastily run up to shelter a small number of men, and form an outwork to some more powerful fortification.

Fleece, Order of the Golden. One of the most eminent orders of knighthood in Europe, was founded in 1430 by Philip III., duke of Burgundy. By its foundation his successors were declared hereditary grand-masters; and thus the title passed to the imperial house of Austria with the Burgundian inheritance, and thence to the Spanish line of the same house after the death of the emperor Charles V. When the Spanish Netherlands, however, became Austrian, and the Bourbons became monarchs of Spain, the grand-mastership was claimed by the archdukes of Austria. Hence at present the Spanish and Austrian sovereigns alike confer the order, and at both courts it gives the highest rank.

Fletch, To. To feather an arrow.