Improvements
I have completed the B class checklist and feel that this article could be improved by addressing the following issues:

 Referencing: in line citations could be added to assist in the verification process. This is essential for a successful B class rating. A rule of thumb is at least one per paragraph, more if more than one source was used, or if there are multiple assertions that might be challenged if not backed up by an in line citation;
 Grammar: the article needs a few tweaks for grammar. Use of '&' in a sentence is not usually preferred under the WP:MOS, additionally some of the wording might be tightened, e.g. '855th Guard squadron...would occupy'. This is a bit cumbersome and perhaps could be improved by saying '855th Guard squadron...occupied'. This would also serve to fix any tense issues that might exist.

Just a few ideas. Once you have done these, you might like to seek re-assessment. This can be done at WP:MHA, or if you would like further input on possible improvements, go to WP:MHPR. Hope this helps.