With credit to Fightercontrol: 12 (two airspares) A-10's flew/ fly today from Whiteman AFB to Pease. So arrival Friday i'd say if everything goes as planned.
Edit Friday to Lajes, and to Zaragoza over the weekend?
Today I noted an HH-60M operating under R20295 (10-20295) out of Amari, which isn't currently deployed with the 1 AD CAB nor 3 CAB. Serial 10-20295 was also noted on April-28th near Riga (arrival?). The helicopter is known to have operated around Godman AAF/Fort Knox, KY, making it possibly a C/5-159th Avn bird. And that is exactly the Army Reserve unit that is here for Defender.
Edit: another source gave me 20296 and 20299 as 2 other birds that arrived through Riga. Both are also affiliated with C/5-159th Avn, so that looks like a confirmation they are also Defender related.
Edit2: 20296 & 20299 noted on adsb 7-5-2023 flying from Amari.
Not sure if this is connect, but UH-72A 12-72235 was noted (ADSB) taking off tonight from Riga port for a test flt. This one was last noted active with the OR ARNG (Det.1 C/1-112th Avn). The callsign box was filled out as URHLA. Make of that what you will.