Many good recommendations in this thread, I could perhaps add a few personal favorites, but, thinking about it, I believe it may be more useful if I post references to sites where you can find a number of primary sources (and other texts) online (with my own personal impressions). Most will be to texts of the Classical era, which, considering how close R:TW is, may be almost good timing. Also, I have added a few references of web-published essays or articles which I've found particularly good and useful.

Soooo...

First of all: Perseus: Amazing. Absolutely amazing. Not just texts. You also have images (Greek vase paintings, for example) and more... As for the texts you have an english translation and an original in either Greek or Latin where you can go and make sure if pila or longche were annoyingly translated as "javelins". And you have lots of interesting primary sources: Caesar, Polybius, Appian, Herodotus, Tacitus, Flavius Josephus, Thucydides, Xenophon, Diodorus Siculus, Livy, Strabo, Sallust, Cicero, Nepos...

http://www.perseus.tufts.edu

Lacus Curtius Roman texts: Nice site. You'd find Cassius Dio's history here and, secondarily, Velleius Paterculus and Frontinus' Stratagemata. Oh, and Procopius' Secret History if you are into that... Also, Polybius again.

http://www.ukans.edu/history/index/e...exts/home.html


Forum Romanum: tons of Latin literature, some of it translated (both off- and onsite). Justin's epithome can be found here.

http://www.forumromanum.org/literature/table.html

The Internet History Sourcebook: Very diverse selection of primary sources, including useful Medieval and Classical ones

http://www.fordham.edu/halsall/

The Online Medieval and Classical Library: A bunch of Icelandic sagas and the Heimskringla too. Plus Saxo Grammaticus Danish History and the Anglo Saxon chronicle.

http://sunsite.berkeley.edu/OMACL/

Arrian's "Array against the Alans" in Sander van Dorst's page

http://members.tripod.com/~S_van_Dor...s/ektaxis.html

And now non-primary sources:

Luke Ueda-Sarson's military history webpage. Highly recommended. Very good articles about Macedonian units, Hellenistic infantry, Alexander's tactics against the Scythians and his interest in war elephants, among other things.

http://www.ne.jp/asahi/luke/ueda-sarson/MilHist.html

Successors of Alexander: quite a comprehensive online book on the Diadochoi. Good reading and informative...

http://hometown.aol.co.uk/bobbbennett/index.htm

Hope someone finds this useful

Cheers
A.