Under this head all his fears were realized First, three-months men (militia) sent for by himself in April, then six-months men called out by Gaines, and then twelve-months men raised under the war bill poured in. By June 3 his army had risen to nearly 8000. Three weeks later the First Tennessee Infantry—advance guard of the Congressional troops — appeared, and it found on the scene six regiments from Louisiana, one from St. Louis, one from Kentucky, seven companies from Alabama and twelve or fifteen from Texas. All of these had come in response to the calls of Taylor or Gaines; and some had been on the ground more than a month. In all about 8000 of these two classes arrived, and in accordance with Taylor's desire nearly all of them—except a very few, who agreed to serve twelve months were sent home about the first of August.[1] Before they took their leave, at least 20,000 American soldiers were on the Rio Grande, besides an inevitable.number of American Civilians more or less directly connected with the army or not connected at all; and by far the greater part of their subsistence had to come, of course, from the United States.[2]
The men were stationed in a series of camps. The best of all these was probably at Point Isabel, where the dry, undulating ground and fresh breezes made for health and comfort Fort Polk, as the station was now called, included about fifty acres. The shallowness of the harbor impaired the convenience of the Point somewhat, however; and the primary camp lay three or four miles away at the north end of Brazos Island, Which consisted of low hills on the side toward the mainland, a swamp in the centre, a wreck-strewn beach on the outer side, and in general three blades of grass to fifty square feet of sand, as Lieutenant George B. McClellan wrote home. Here, too, the air was excellent; but the brackish Water caused many complaints, and the sand blew into everything — hair, nose, eyes and food. Marching the entire length of the island the soldiers found themselves, at its southern end, about eighty yards from the mainland. waded across the bayou or strait known as Boca Chica, and after going about seven miles farther came to another camp and group of storehouses, ten miles or so from their point of departure, called Mouth of the Rio Grande, Where the river steamers tied up
