www.warfarehistorynetwork.com Lots of war stuff. Tends to be 20th century, with plenty of coverage of US forces. You can register and read the articles for free. I found them quite comprehensive, with more depth than in many popular sites, but not as nut-and-boltery as some grog websites. It's to promote their military history magazines but I think they are not available outside the USA. Seemed to have a promo of Military Heritage for $15 one year. The others are WW2 History Monthly and Quarterly.