It was for a long time thought by some, that, although the Chasseurs, like the Zouaves, had been successful in the skirmishing engagements of Algeria, they would not be found so useful in European warfare. This opinion was proved to be erroneous at the siege of Rome, in 1849, where the Chasseurs, armed with their new and terrible weapon, the _carabine à tige_, in the management of which they had been thoroughly drilled, rendered the most important service; and from what was seen of them there it became evident that the existence of such a force, so perfected in every particular, would hereafter greatly modify the relations and conditions of the defence and attack of fortified works. The importance of this fact will impress the reader, when he remembers how large a part fortresses have played in warfare since 1815, and especially when he glances at the tendency everywhere perceptible now toward transforming military strongholds into great intrenched camps, as revealed at Antwerp in Belgium, Fredericia in Denmark, Buda and Comorn in Hungary, Peschiera, Mantua, Venice, Verona, and Rome in Italy, Silistria and Sebastopol in the East, and Washington, Manassas, and Richmond in America. Other nations have not been slow to follow French example. Russia is rapidly manufacturing rifled pieces for her service; England is providing her whole army with the Minié musket, and Austria and Prussia are applying inventions of their own to the armament of corps organized and trained on the principle of the French Chasseurs. The Duke of Wellington is said to have remarked, not long before his death, while speaking of the English troops, that they had, indeed, adopted the new musket, but that it would be physically difficult for them to transform themselves into light infantry. The same observation will undoubtedly apply to all the Continental nations excepting the French; but in the United States, while we could muster the finest heavy troops in the world, we have also the most abundant material for just such light infantry as those described in the foregoing sketch. The Chasseurs are not merely distinguished as perfect light infantry, but they also form excellent troops of the line. By the weight of their fire, they are capable of producing in battles and sieges effects unknown before their appearance on the scene, and that is the great point, the entirely new feature about them.