The dday.rar file you have requested: Maps / 4 Player Maps / D-Day - 9.34mb is not available. Perhaps try browsing all files for the game Company of Heroes and upload any files you want to share or are missing. This is the only information we could locate:
Itsis basically a D-Day invasion map, which is simply just the D-Day map made into a 2v2 map, 2 allies vs 2 axis. Its better played as victory points.