It might be helpful to know a little more about this Martha and the ascribed DOB of 1745, for the single name, in isolation, makes it difficult. If you can locate a copy of the 1999 work by the late William Carmi Gaddy (line from Ithamar, s/o Thomas and Lucie) and his wife, the late Corinne McDougald Gaddy, "That Our Names May Be Written: A Gaddy Family History" (privately printed, Baton Rouge, LA) it may offer some leads. It is the best compilation I have seen on the Thomas/Lucie (Lucy) family of VA/NC. Unfortunately, it is comprised of a well-indexed textual section, but an unindexed final third of descendancy charts which have to be perused. The earliest land acquisition I have seen for this Thomas is 1747 in what had become Bedford County, VA, just west of Lynchburg. He and wife Lucy/Lucie departed from homestead there in 1760 and moved to NC, as you have it. I believe that their son, Thomas (I call him "T2"), was already part of the family when they moved. I accept a total of eight years of Rev War service for T2. I feel fairly confident that "T1"was a s/o William and Mary Gaddy(Gaddey) of VA, coming put of Blisland Parish, New Kent County to Henrico and Chesterfield. And I also accept the probability that Sherwood and George (and several daughters) were siblings. The bulk of court records of New Kent were destroyed in the 18th Century, making it difficult to bridge the ocean. With the advent of the computer and the Internet, the situation has become quite confused by attaching older "look-alike" data and running ancestry-charting back, with little regard to the evidence. (An example is the confusion between New Kent Gadd(e)y and Geddy, a later-arriving Lowland Scot family, whose name is preserved in Colonial Williamsburg, but who led me a merry chase for eighteen years.) If the c1745 DOB seems solid, and Virginia is the location, you appear to be in "the right ball-park," but be prepared for a large attendance and a lot of empty seats. It can be frustrating but also fun.