It is apparent, immediately on statement, that against commerce-destruction by blockade, the recourse of the weaker maritime belligerent is commerce-destruction by cruisers on the high sea. Granting equal efficiency in the use of either measure, it is further plain that the latter is intrinsically far less efficacious. To cut off access to a city is much more certainly accomplished by holding the gates than by scouring the country in search of persons seeking to enter. Still, one can but do what one can. In 1861 to 1865, the Southern Confederacy, unable to shake off the death grip fastened on its throat, attempted counteraction by means of the “Alabama,” “Sumter,” and their less famous consorts, with what disastrous influence upon the navigation—the shipping—of the Union it is needless to insist. But while the shipping of the opposite belligerent was in this way not only crippled, but indirectly was swept from the seas, the Confederate cruisers, not being able to establish a blockade, could not prevent neutral vessels from carrying on the commerce of the Union. This consequently suffered no serious interruption; whereas the produce of the South, its inconvertible wealth—cotton chiefly—was practically useless to sustain the financial system and credit of the people. So, in 1812 and the two years following, the United States flooded the seas with privateers, producing an effect upon British commerce which, though inconclusive singly, doubtless co-operated powerfully with other motives to dispose the enemy to liberal terms of peace. It was the reply, and the only possible reply, to the commercial blockade, the grinding efficacy of which it will be a principal object of these pages to depict. The issue to us has been accurately characterized by Mr. Henry Adams, in the single word “Exhaustion.”[30]