Closeups of Dads Uniform Patches What Are They?

These are the last of the pics I will post concerning my dads uniform. My thanks to go out to all of you that have identified all of his ribbons and medals, and if possible for my sake, as well for the education of others, if you could please let me know what each of these 4 pics are, in order, so that I don't have each patch confused with the others. I know the answers have been given to me before but I'm not sure which is which. The patch in pic one, the brass insignia on the left lapel of pic two, the top patch (with wings & rifle) in pic three, along with what the "T" means located below the chevrons of the Sargent patch (and why would this Sargent patch be gray & black while the other two Sargent patches I have of his be gold & black?) and lastly, the two separate stripes/patches on the bottom of the sleeve in pic four. Thank you in advance for past, present, & future help.