I am planning on to do my major History essay on this topic. I've already read huge chunks from 'Enemy at the Gates: The Battle for Stalingrad' and so far I have about 2 pages of scattered notes. However even with the notes I don't seem to have anything directing me towards an answer to my argument (My argument being essentially 'was Stalingrad a Geramn defeat due to tactics or conditions?')

all I have are notes and excerpts giving me an idea. If were to write a paragraph based off the notes I have it wouldn't provide a clear answer to my paragraphs.

Really what i'm asking is for a discussion. I'd like to see some historian essentially discuss my proposed question just so I can collect a vague idea or clear answer of the question. If not, a link to any good sources would be useful.

Final note: Last time I posted a question like this in regards to a drama assignment on /r/acting, I got accused of attempting to get people to do homework for me. So just in-case, here is an excerpt of my notes just to prove I have done research myself. These notes are very brief and require the source material to be added with it. These notes just include the key details I picked up on from the source. (http://i.gyazo.com/937cc81dafc73e55dd5c5f18642910e3.png)

EDIT - By conditions, I mean stuff such as: Weather, Location, Rations etc.