Our coast defences as they existed in 1860 were not surpassed in efficiency by those of any country, but within a few years the introduction of rifled cannon and armor in the navies of the world, against which the smoothbore guns were practically useless, rendered them obsolete.
Roosevelt reflects on the obsolescence of 1860s coast defenses due to advancements in military technology, highlighting the need for modernization.
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France is one of these nations. For her to sink would be a loss to all the world.
The boundaries of said National Forest are now as shown on the said diagram.
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