28e brigade de cavalerie légère:
http://books.google.com/books?id=w4ZWAAAAMAAJ&pg=PA417
10.iv.1812:
http://books.google.com/books?id=0RoZAQAAIAAJ&pg=PA150
14.vii.1812:
http://books.google.com/books?id=WyIKAAAAIAAJ&pg=PA350
http://books.google.com/books?id=WyIKAAAAIAAJ&pg=PA351
26.vii.1812:
http://books.google.com/books?id=Ae4aAAAAYAAJ&pg=PA252
http://books.google.com/books?id=3g03AQAAMAAJ&pg=PA252
I do not see them ever Eugene's IV Corps.
What is your source?