Yes, no doubt many did. “Many Thousands” is speculation
Thousands, In HS I wrote a paper on this very subject a long time ago. Many VA regiments had more Marylanders than Virginians. Entire VA cavalry troop companies were Maryland men. They had to bring their own horse and if the horse got shot - KIA’d they had a short period of time to replace the horse or join the infantry or artillery, Yuk....