For your study of World War II there are a variety of Internet sources.  There are, however, thousands of web pages, some of which are excellent, accurate and informative, while many others may, unfortunately, give you mere opinion, or even erroneous facts.  You need to rely upon sources which are of high quality.

Encyclopaediae

To begin with, you might use Encyclopaedia Britannica which offers a) the encyclopaedia articles,
      b) some of the web's best sites, and c) specific magazine articles which deal with the topic.  This should give you a general introduction to the war itself, as well as the specific battle.

If you are dealing with a battle in which Canadians participated, by all means use the
     Canadian Encyclopedia.  It gives you excellent descriptions and anecdotal comments.

Directories

Directories are an excellent place to begin your research on any number of topics.  People have examined a large number of sites dealing with World War II battles andhave chosen the best.  This can save you a lot of research time., because they are usually good at what they do and make good choices.

First look at Yahoo Canada.  Simply type in "World War II" in the search box.  The first hit will be a category.  Click on this and you will be given a whole series of subtopics about the war.  Continue to follow these sub-categories until you get  a list of the relevent sites.

Pandia operates the same way.

About operates a little bit differently in that it provides subject experts who offer suggestions and commentaries.  You will notice that after typing in "World War II that you will get a whole series of categories.  Read them over to find the one(s) which will be helpful.

About offers a "Campaign Map" http://militaryhistory.about.com/homework/militaryhistory/gi/dynamic/offsite.htm?site=http
%3A%2F%2Fwww.onwar.com%2Fmaps%2Fwwii%2Findex.htm site which has great map sites of the battlefields.  This could be useful.

The Web

If you can still not find the information that you need you can turn to the Web.  Check out veterans sites or educational sites.  These latter are identified by an "edu" in the URL address, or  an "ac", if a British site.