. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "The Fortress Age is followed by the Industrial Age."@en . "The Fortress Age is followed by the Industrial Age."@en . . . . "Fortress Age"@en . . . . . . . . .