This "circumstance" was the annexation of Texas, the probability of a war with Mexico, and the necessity of leaving Jefferson Barracks for the Texan frontier. Alas! now that days full of hope, and the sweet realization of a divine companionship had come, they must have sudden ending. Grant took a brief furlough, went to say good-bye to his father and mother, and then to White Haven to see Julia Dent. In crossing a swollen stream, his uniform was wet through, but he donned the suit of a future brother-in-law, and appeared before his beloved to ask her hand in marriage, to receive her acceptance, and then to hasten to the scene of action. He saw her but once in the next four years and three months; four anxious years to her, when death often stared her lover in the face. As soon as Texas was admitted to the Union, in 1845, the "army of occupation," as the three thousand men under General Zachary Taylor were called, advanced to the Rio Grande and built a fort. When the first hostile gun was fired, Grant says, "I felt sorry that I had enlisted. A great many men, when they smell battle afar off, chafe to get into the fray. When they say so themselves, they generally fail to convince their hearers that they are as anxious as they would like to make believe, and as they approach danger they become more subdued. This rule is not universal, for I have known a few men who were always aching for a fight when there was no enemy near, who were as good as their word when the battle did come on. But the number of such men is small." The first battle was at Palo Alto, meaning "tall trees or woods," six miles from the Rio Grande. Early in the forenoon of May 8, Taylor's three thousand men were drawn up in line of battle, opposed by superior numbers. The infantry was armed with flintlock muskets and paper cartridges charged with powder, buckshot, and ball. "At the distance of a few hundred yards," says Grant, "a man might fire at you all day without your finding it out." The artillery consisted of two batteries and two eighteen-pounder iron guns, with three or four twelve-pounder howitzers throwing shell. The firing was brisk on both sides. One cannon-ball passed near Grant, killing several of his companions. After a hard day's fight, the enemy retreated in the night. The war had now begun in earnest, and the man who at the first hostile gun "felt sorry that he had enlisted" was ready to brave danger on any field. In the hard-fought battle of Monterey, between sixty-five hundred men under Taylor and ten thousand Mexicans, Grant's curiosity got the better of his judgment, and, leaving the camp, where he had been ordered to remain, he mounted a horse and rode to the front. He made the charge with the men, when about a third of their number were killed. He loaned his horse to the adjutant of the regiment, Lieutenant Hoskins, who was soon killed, and Grant was designated to act in his place.