In 1832, at the behest of President Jackson, the Army re-adopted something of the revolutionary war facings. Consequently, Artillery uniforms were faced red, and trimmed with yellow, and yellow buttons.
Here's the regulation artillery uniform at the close of the Revolution:
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After 1813, and through the 1820s, the artillery uniform was blue, with yellow buttons and trim.
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The artillery fatigue jacket was gray, with the same yellow trim and buttons as the coat, from 1821-32.
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So the 1832 artilleryman's coat adopted was this one...
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This late 19th Century illustration by Ogden shows an artillery sergeant sitting (fringed yellow epaulettes, and red striped trousers), etc. The infantry uniforms were trimmed white from 1832-51.
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The commonly worn fatigues included a sky-blue cloth jacket, with the same yellow trim and buttons (vest size) as the uniform for artillerymen (white for infantry).
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After 1838, the Army equipped a few companies as field artillery batteries (prior all were armed and equipped as infantry, and served as fortress troops, or heavy artillery, in garrison). These were particularly equipped and trained, and for the extra trouble of handling the horses, etc., it was allowed that these companies dress somewhat distinctly, beyond the established regulations.
Here's a uniform coat of the horse artillery companies by 1846. Essentially just a modified dragoon uniform coat (short tails, double bredasted, but faced in red instead of yellow).
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They also wore a distinctive cap, as I recollect, more like the dragoon cap than the common artillery cap, viz. with red horsehair plume instead of the simple red pom-pom of the regulations.
This horse artillery uniform was not regulation, but it was noted by the historian of the US artillery William Birkhimer, that being assigned to these batteries was in fact unpopular, given there were no more pay for the trouble than among the artillery generally (fortress garrisons).
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So evidently the fancier uniforms were a nod to encouraging the officers and men. This distinct light or horse artillery battery uniform is not regulation, and is not described in the 1841 or 1847 uniform regulations.
It appears these horse and field artillery batteries frequently had some distinctions in dress, in both uniform and fatigue.
Mexican War dragoon veteran Sam Chamberlain depicted in his watercolors the light artillerymen in their distinctive uniform, as here in the plaza at San Antonio...
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And at Buena Vista, in 1847, Chamberlain shows the light artillery in fatigues, but yet in some distinction of dress, including red trimmed jackets, sabers, etc.
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Besides those artillery companies equipped as field artillery, the majority which partook in the war did so as infantry.
In 1851 the simple branch colors of light blue for infantry, yellow for cavalry, red for artillery, green for mounted riflemen, and orange for dragoons was adopted.
The regulation uniform for artillery was the dark blue frock coat with red facings, and later simpler red cord trimmings.
Old pattern sky-blue jackets were still provided for fatigue dress to artillery into the 1850s, but now with red cord added.
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though by the mid-1850s, the light artillery was provided with a uniform jacket for wear in lieu of the uniform coat or fatigue jacket.
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By 1862, here is the regulation uniform of the artillery, still with a frock coat.
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and the light artillery... with a jacket in lieu of a frock coat...
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