George Martin
Here's what I find:
Richard Bridges, age 18, born in Yazoo County, Mississippi, Blacksmith, enlisted by Adj. Gen. R. Griffith as a Private in Captain S. M. Phillips' Company (Yazoo Minute Rifles, Mississippi Volunteers**March 25, 1861 at Yazoo City for 12 months, discharged and reenlisted for the war transferring to the 9th Mississippi regiment December 19, 1861,
**This company was successively designated as Captain Phillips' Company, Mississippi Volunteers, and as Captain Peake's Company, and (Old) Company K, 10th Regiment Mississippi Infantry.
The 10th Regiment Mississippi Infantry was organized in March, 1861, with ten companies of 12-months men which were lettered A to K. Early in 1862 five new companies of 3-year men were added and lettered L to P. In March 1862, some of the 12-months men were discharged, the others re-enlisted for two two years, and the fifteen companies consolidated into eight companies and lettered A to H. Two new companies formed of recruits were added and lettered I and K.
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I do not find him in the 10th Mississippi Infantry or Cavalry, but believe he wound up in the 46th Mississippi based on enlistment dates.
Richard Bridges, Company C, 46th Mississippi Infantry**, enlisted March 25, 1861 at Yazoo City by Captain Griffith, surrendered at Vicksburg July 4, 1863, paroled and furloughed at Enterprise, Mississippi from July 23 to August 23, recorded as deserted at Yazoo City October 15, 1863 on the November/December muster roll, no further records
The companies next muster roll January/February 1864 notes in their Record of Events.
Company [re]organized in Yazoo Co. Miss. while under parole. Many deserted to the enemy, and other have avoided service by keeping within the enemy's lines
**The 6th (Balfour's) Battalion Mississippi Infantry was organized about April, 1862. It was afterward increased to a regiment and its designation changed to 46h Regiment Mississippi Infantry.
Company C, Yazoo Pickets, Yazoo County
http://www.gwest.org/46thmsin.htm
I do not find him listed in any Federal units.
46th Regiment, Mississippi Infantry
46th Infantry Regiment was organized during the fall of 1862 by adding four companies to the six-company 6th (Balfour's) Mississippi Infantry Battalion. In February, 1863, it totalled 407 effectives and served in S.D. Lee's and Baldwin's Brigade in the Department of Mississippi and East Louisiana. The unit participated in the long Vicksburg siege and was captured on July 4, 1863. After the exchange it was assigned to Generla Baldwin's, Tucker's, and Sears' Brigade. It fought in the Atlanta Campaign, endured Hood's winter operations in Tennessee, and shared in the defense of Mobile. The regiment had 1 wounded at Chickasaw Bayou and during the Atlanta operations, May 18 to September 5, reported 23 killed, 68 wounded, and 37 missing. It lost 1 killed, 13 wounded, and 16 missing at Allatoona and had many disabled at Franklin. Only a remnant surrendered in May, 1865. The field officers were Colonels William H. Clark and Claudius W. Sears, Lieutenant Colonel William K. Easterling, and Major Constantine Rea.
http://www.itd.nps.gov/cwss/regiments.cfm