Blogosphere
Blogosphere is a term that represents the community of all blogs. The word resembles several words of Greek origin such as logosphere (mind and world) and atmosphere (vapor and world). As is common with many words describing new phenomena or technology, the word creator simply took the Greek suffix for world and added blog to the front of this. Because the word sounds like many existing English words of similar construction, the word caught on relatively quickly.
Brad L. Graham first used the word blogosphere as a joke in 1999. It was re-coined in 2002 and was fist used extensively in the warblog or military blogging community. Although some people still use the word only in a joking sense, the term is catching on in the mainstream media with usage by mainstream stables such as the BBC and NPR.

Warblog
The term warblog or miliblog is a term describing blogs devoted mostly or entirely to all things related to war or military, such as military history, currently deployed soldiers, or commentary on anything military.
Warblogs first entered the blogosphere in 2001 during the US invasion of Afghanistan and have gained an expanding foothold with the continued US presence in Iraq. Warblogs often straddle the line between warblog and personal blog as many deployed US soldiers use them to keep in touch with family and friends back in the US. Although many warblogs initially focused on the military and warfare, over time they have expanded to include posts on politics in general. Some notable warblogs include: Command Post and Little Green Footballs, although Charles Johnson the site’s author does not believe LGF should be categorized.