Ed is correct when put in as KG 355 (Kampfgeschwader or bomber wing in English) there is a good deal of information.
The most direct route for KG 355 and what it became, i.e. KG 53 can viewed on the following site/ link.
http://www.ww2.dk/air/kampf/kg53.htm
Depending on how deep you want to go you can find more but this is a decent starting point.
Jeremy