5.3 Fortresses
If you want to give your barracks and shipyards extra protection then you must build a fortress around them. Building fortresses on newly conquered territory to strengthen your advance and to protect occupying forces (see 6.4.1.2., p48), and in strategic locations such as Gibraltar (see 6.4.1.4., p49) or on either side of the Strait of Copenhagen (see 6.4.2.5., p53) is also sound strategy.
Fortresses give armies a defensive advantage in both mathematical and simulated battles (see 6.3, p42, 6.4.2.5, p53, 7.1.8, p68, 7.2.2.4, p71, 7.2.11, p87).
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