How to Use the Images

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Drawing 2: San Cristóbal.

Photo 2: Aerial view of San Cristóbal.

San Cristóbal illustrates a principle known as "defense in depth," in which each part of a fort supports, and is supported by, one or more other parts. This system means that even if an enemy breaks through an outer barrier, there are higher and stronger sections that the defenders can use to drive out the attackers.

Questions for Drawing 2 & Photo 2

1. Refer to the paragraphs on San Cristóbal in Reading 2. Which of the elements mentioned there—the city wall, the cavalier, the moat, the plaza de armas and the hornwork—can you label on Drawing 2?

2. How do the Santiago ravelin, the Trinidad counterguard, the great moat, and the hornwork illustrate "defense in depth"?

* The images on this screen have a resolution of 72 dots per inch (dpi), and therefore will print poorly. You can obtain a high quality version of Drawing 2 and Photo 2, but be aware that each file will take as much as 60 seconds to load with a 28.8K modem.