A judgment may be formed of the weakness of the place, either by the facility found in making the approaches, or by establishing the magazines in the rear of the trenches, taking advantage of some rideau, or hollow way, whereby the right and left of the trenches are better supported. In order to judge of the facility of making the approaches, observe whether there are in the neighbourhood of the place any ditches, hollow ways, rideaus, houses, hedges, behind which the enemy may advance, and place their guards of horse and foot under cover from the fire of the place ; …

Rideau. A small rising ground or eminence, commanding a plain, which is sometimes near parallel to the works of a place. It is a great disadvantage to have Rideaus near a fortification, especially when they shoot from far, and terminate on counterscarp; for they not only command the place, but likewise facilitate the enemy's approaches.

At the end of a three hours' cannonade, few if any of the Danish block-ships, prames, or rideaus, had ceased firing ; […]

In less than an hour we arrived at the side of a small covert overhanging a rideau (or bank) of considerable extent : […]

About the 24th proposal was made for taking the enemy's vessels, three of which were at anchor a little below the fort, and some of their rideaus likewise.

Leaving only a rideau of troops on the left bank of the James, Grant sent Sheridan and the greater part of the army to the Potomac […]

Rideau

Meaning

Noun

Name

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