I will not list Union flags that were captured, then recaptured.
Now with the 2nd Pennsylvania Heavy Artillery Regiment, they lost a flag/flags on June 22nd, 1864. "Jerusalem Plank Road". But one was recaptured, as you pointed out. What is very confusing is several Union colors lost between June 15-18th, 1864. Basically entire Second Corps veterans refused to charge, so the heavy artillery regiments did. Hence, 7th NY HA. The 1st Maine HA, lost around 600ish men out of 900ish men. I do know the 145th PA must have gone in the charge for they lost a flag or flags. It was suicide attack and once they charged and lost many men it was difficult to find the flag pick it up and run back. I know there are a few old books on Grant's First Offensive and I am searching for them.
I have a ton of work to do, but I am making great progress!
Thank you Charles and everyone for all the hard work and many hours a day you all put into this!
Have a good night,
Shawn Prouty