I like that you come up with neat stuff a lot
HAR HAR HAR
seriously though, so far I think there's been a nice balance of visual treats and articles.
I would like to see a breakdown on effective assault and defense in woods (preferably a mix of screenshots and text).
Other topics that could make good articles, a general keeping your infantry alive type, concealed movement (how effective are sneak and crawl/in what types of terrain are they appropriate)
This would be one big spoiler but a complete breakdown of one of the beta maps showing traps and strategies (I know it's all relative to each particular game but each map has definite features which lend themselves to various tactics).
The mortar article by Fionn was very nice, to do more articles along the same lines would be great.