After leaving school, the military spirit of young Taylor was constantly fanned by the popular excitement against the continual encroachments of England; and soon after the murderous attack of the British ship Leopard upon the Chesapeake, in 1808, he entered the army as first lieutenant in the 7th regiment of infantry. He soon gained distinction in border skirmishes with the Indians, and the declaration of war with England found him promoted to the rank of captain. Within sixty days after the commencement of hostilities in 1812, the imbecility of Hull lost to the country its Michigan territory, and fearfully jeoparded the whole northwestern region. It was of the utmost importance to intrust the few and feeble forts of that great dominion to men of established valor and discretion. Captain Taylor was at once invested with the command of FORT HARRISON, situated on the Wabash, in the very heart of the Indian country. The defenses of this post were in a miserable condition, and its garrison consisted of only fifty men, of whom thirty were disabled by sickness. With this little handful of soldiers, the young commander immediately set about repairing the fortifications. He had hardly completed his work, when, on the night of the 4th of September, an alarm shot from one of his sentinels aroused him from a bed of fever, to meet the attack of a large force of Miami Indians. Every man was at once ordered to his post. A contiguous blockhouse was fired by the enemy, and a thick discharge of bullets and arrows was opened upon the fort. The darkness of the night, the howlings of the savages, the shrieks of the women and children, the fast approaching flames, and the panic of the debilitated soldiers, made up a scene of terror, but could not shake the determination nor the judgment of the young chieftain. He inspired his men with his own courage and energy. The flames were extinguished, the consumed breast-works were renewed, and volley answered volley for six long hours till day break enabled the Americans to aim with a deadly precision that soon dispersed their foes. This gallant repulse, at odds so unfavorable, prompted a report from Major General Hopkins to Governor Shelby that "the firm and almost unparalleled defense of Fort Harrison had raised for Captain Zachary Taylor a fabric of character not to be affected by eulogy;" and forthwith procured from President Madison a preferment to the rank of brevet major, the first brevet, it is said, ever conferred in the American army.