[Footnote 4: Strategy may be learned from didactic works or from general military histories. There are very few good elementary works on this branch of the military art. The general treatises of the Archduke Charles, and of General Wagner, in German, (the former has been translated into French,) are considered as the best. The discussions of Jomini on this subject in his great work on the military art, are exceedingly valuable; also the writings of Rocquancourt, Jacquinot de Presle, and Gay de Vernon. The last of these has been translated into English, but the translation is exceedingly inaccurate. The military histories of Lloyd, Templehoff, Jomini, the Archduke Charles, Grimoard, Gravert, Souchet, St. Cyr, Beauvais, Laverne, Stutterheim, Wagner, Kausler, Gourgaud and Montholon, Foy, Mathieu Dumas, Segur, Pelet, Koch, Clausewitz, and Thiers, may be read with great advantage. Napier's History of the Peninsular War is the only English History that is of any value as a _military_ work: it is a most excellent book. Alison's great History of Europe is utterly worthless to the military man; the author is ignorant of the first principles of the military art, and nearly every page is filled with the grossest blunders. We subjoin the titles of a few of the best works that treat of strategy, either directly or in connection with military history. _Principes de la Strategie, &c._, par le Prince Charles, traduit de l'Allemand, 3 vols. in 8vo. This is a work of great merit. The technical terms, however, are very loosely employed. _Precis de l'Art de la Guerre_, par le Baron Jomini. His chapter on strategy embodies the principles of this branch of the art. _Grundsaetze der Strategic_, Von Wagner. _Cours Elementaire d'Art et d'Histoire Militaire_, par Rocquancourt. This work contains much valuable information connected with the history of the art of war; but it is far too diffuse and ill-arranged for an elementary book. _Cours d'Art et d'Histoire Militaire_, par Jacquinot de Presle. This work is especially designed for cavalry officers, and the other branches of military service are but very briefly discussed. De Vernon's Treatise on the Science of War and Fortification contains much valuable information; but, as an elementary book, it has the same objections as that of Rocquancourt. _History of the Seven Years' War_, by Lloyd and Templehoff. The military writings of Lloyd and Templehoff are valuable as connected with the history of strategy; but many of the principles laid down by these writers are now regarded as erroneous.