I have once source which says that Matthew Beraud was a Captain in the Ninety-Six district milita, He enlisted in Sept. 1779 and died during the siege of Savannah, October 9, 1779, having served only 27 days. See:http://www.thomasnelsonjr.org/o/p1.html.
I have another source that states Matthew Beraud was known to be a Major in the Upper Ninety-Six District Militia. See http://www.carolana.com/SC/Revolution/patriot_militia_sc_upper_nine....
I have a third source that says Matthew Beraud was known as "La Viotette," who had served in the French Army and indiciates he received a high position in the militia due to his experience in the army. See http://fitzhughwilliams.org/newbord/nbord.html.
There were two emigres in Abbeville named Matthew Beraud. One was age 35 and one was age 23. It would be most likely that older Matthew was the former French soldier, and was probably the one who advanced to the rank of major. The older Matthew was listed in the Abbeville records as a laborer. If he had been serving in the French army, he probably had not had a chance to establish a career. The younger Matthew was probably the captain who died after 27 days service.
I hope we can find more documentation about the two Matthews and their military service.
Thank you for this valuable resource. I have sent a message to fizhughwilliams with your information to hope he will edit his post to show the possiblities of two different military men. This solves the mystery of how Matthew Beraud's widow could remarry before 1799 when the younger male passed away at the battle of Savannah.