On the eighteenth of December a grand review of the Louisiana troops was held by Jackson in front of the old Cathedral, now Jackson Square. The day was memorable by many incidents, not all in harmony with the purposes and plans of the civil and military leaders of defense. The entire population of the city and vicinity were present to witness the novel scenes, men and women vying with each other in applauding and enthusing the martial ardor of the soldiers on parade. Such an army, hastily improvised in a few brief days from city, country, and towns, made up of a composite of divergent race elements, as was that of the Louisiana contingent with the command of Jackson at New Orleans, was perhaps never paralleled in the history of warfare before. Major Plauche's battalion of uniformed companies was made up mainly of French and Spanish Creoles, with some of American blood, enlisted from the city; and from the same source came Captain Beale's Rifle Company, mostly American residents. The Louisiana militia, under General Morgan, were of the best element of the country parishes, of much the same race-types as Plauche's men, of newer material, and without uniforms. Then came the battalion of Louisiana free men of color, nearly three hundred strong, led by Major Lacoste, and another battalion of men of color, two hundred and fifty in number, commanded by Major Daquin, recruited from the refugees in New Orleans from St. Domingo, who had taken part in the bloody strifes in that island, and who bore like traditional hatred to the English, with all who spoke the French tongue. Add to the above a small detachment of Choctaw Indians; and lastly, the loyal pirates of Lafitte, who were patriotic enough to scorn the gold of England, and brave enough to offer their services and their lives, if need be, to the cause of our country; and together, these give us a picture of the men under review, whom Jackson was to lead to battle in a few days against the best-trained troops of Europe. Though of new material, and suddenly called into service, this provincial contingent of twelve hundred men, animated with the spirit of battle against an invading foe, proved themselves, when ably officered, the equals of the best troops in the field. JACKSON DECLARES MARTIAL LAW.