By the decree of 1 December and the orders of 20 december 1847 reorganized the Mexican infantry into numbered 20 battalions (1 to 20) in the "permanent" or regular force. The law of 4 November 1848 reduced the number of battalions to 8.
By a resolution of 7 January 1848 confirmed by the decree of 1 December 1848, the uniform was to be as follows: blue Queretaro cloth tunic with scarlet collar, cuffs and piping, battalion number at the collar, yellow (brass/gold) numbered buttons, without epaulettes and only with a blue shoulder strap, grey cloth pantaloons with scarlet piping, grey cloth "levita" (a short skirted tunic), shako without garnishings except for a scarlet pompon and a shako plate stamped with the battalion number.
The Santa-Anna 1853-1854 reforms will require research into primary sources, a period I have not gone into as I cut off at 1848. You will find a short secondary source summary in: Hefter, Joseph, ‘Cronica del Traje Militar en Mexico del Siglo XVI al XX’, Artes de Mexico, No. 102, año XV (1968).
The essential primary source in published documents is: "Legislacion mexicana", compiled by Manuel Dublan and José Maria Lozano, (Mexico, 1876-1912), 42 volumes. The appendice to Vol. 1 is an especially important source. The Library of Congress has microfilms of this work.
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