The Regular Army (RA) swelled from about 15,000 men to 40,000 during the war. I would allow that record keeping in the 6 temporary "for the war" regiments was far less than perfect. Record keeping for the 1st Dragoons, with its headquarters at Ft. Leavenworth and its companies scattered with the commands of generals Wool, Scott, Kearny and Price, must have been a real challenge for the clerical staff back home. Nonetheless, it was done and, as far as I can tell, done corrrectly during the war. It is also important to bear in mind that a soldier who deserted in the Mexico was very likely to be murdered by irregulars. Suffice it to say, this fact alone deterred most desertion.
Back to B Company of the 1st Dragoons, its five desertions occurred before the company left Ft. Leavenworth for New Mexico with Kearn's Army of the West. There were no reported desertions during operations in New Mexico and Chihuahua. My guess is that other RA regiments suffered most of their desertions before the regiment departed the States for the seat of war.
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