Regions Geographiques - A series of political maps of the ancient world. Useful for campaigns. In French but obvious.

The Roman Army Page - A large Roman army resource with many links.

RomanArmy.com - as you may guess a site about the Roman army.

Ancient & Classical History - Another large links site.

The Internet Classics Archive - Classical literature translations.

Perseus Encyclopedia - Texts and translations.

Project Gutenburg - A possible source of texts.

Internet Ancient History Sourcebook - Again, as it says.

Medieval Histrory Sourcebook - Medieval version of above.

Islamic Sourcebook - Another resource as above.

Regnal Chronologies - Dates of rulers from around the world from the year dot.

Trajan's Column - A site devoted to Trajans Column.

WoTR Battles - Wars of the Roses Battle details.

Electronic Antiquity - More ancient sources.

Qin Dynasty On-Line Source Book - A site dedicated to the Chinese Qin dynasty of the first emperor.

The War Times Journal - A general resource on later warfare.

Ancient Texts - As it says.

Notitia Dignitatum - A listing of the units and persons, but no shield patterns.

Lacus Curtius - A site for Roman information, including some translated texts.

The Ancient World - A site with a wide range of texts.

Histos - Electronic journal of Historiography from Durham University.

Trajan's Roman Cavalry - An interesting site on Roman cavalry by a re-enactor.

De Re Militari - The Society for Medieval Military History; they have some useful information including primary source translations.

Roman Britain - A site on the Romans in Britain.

Vortigern Studies - Another Roman site with a lot on Britain.

Mike Bishop's Page - Home page of a Roman scholar who has published many useful books.

Armatura - Home page of the Romec Conference started by Mike Bishop.

Onanmastikon - A resource of names from history.

Oriental Institute - The web site of the Oriental Institute of the University of Chicago.

British Archeology - Name says it all. )

On Line Books - On-line book library, vast including some history stuff.

Notitia Dignitatum Portal - A link to many many resources.

Hellenistic Macedonia - A site about what it says.

Kushan - Site about the Kushans.

Classical Fencing - Site that covers medieval mounted combat amongst other things.

Samnite History - Self explanatory I hope.

Armenian History - Again, self explanatory - translated historical sources.

House of Ptolemy - Site dedicated to the Ptolemaic rules of Egypt.

Parthia - A site about the Arsakid rules of Parthia.

Archway - A project to create a single searchable resource for academic journals - some are available on-line.

Early Church Fathers - Translations of works of early Christians, plus a few other bits such as Zozimus.

Transoxiana - A site devoted to Transoxianian archaeology.

Ancient Texts - Translations of some ancient texts.

Rome's Desert Frontier - an extract from a book of this title.

Dura Europas - Simon James' site; an archaeologist who helped excavate Dura.

Roman Emperors - A site about a colourful bunch.

Livius.org - Articles on ancient history.

Attalus - Site with links to many original texts and translations; extremely useful.

Jordannes - His account of the history of the Goths.

In Parentheses - Texts and translations.

Muntaner - Historical account on the Catalans.

Ugly Chinese - Site on Chinese history - very good.

Circle of Ancient Iranian Studies - About ancient Iran.

Lorica Segmentata - A site devoted to this Roman armour type.

Companions of the Prophet - Accounts of the followers of the Prophet.

Hellenistic and Roman Bibliography - Self descriptive really.

Sasanid relations with Aksum - Again self descriptive.

Levantia - Site on Byzantines.

Byzantine lamellar armour - Site on possible reconstruction.

Fifteenth Century.net - Wars of the Roses information page.

Invasion Scrolls - site with the Japanese Invasion Scrolls on.

Civic Arms - site with various civic heraldry on.

Steppe Re-enactment - about what it says.

Medieval Town Maps - What it says really.

Chinese Sourcebook - Useful info on the Chinese.

Chinese Paper Armour - Short work on an unusual subject.

Theses Canada Portal - possible source of information.

Persian Literature in Translation - what it says, may be useful.

The  Electronic Text Corpus of Sumerian Literature - an interesting resource on some of the earliest texts.

Early  Blazon - site on early heraldry.

Medieval Archaeology - 50 years of this archaeological magazine now online.

African  Empires - site on medieval African armies.

The Prophet and the First Muslim State - book on the subject.

Biography  of the Prophet - what it says.

Adamklissi - pictures from the tropeaum.

Legion VIII Adamklissi - more pictures of this site.

Council  for British Archeology - site includes a resource for some archeological reports.

Early  Imperial China - Rafe de Crespigny's works on China in the 3 Kingdoms  period.

Dura pictures - What is says.

Palmyra  pictures - Again, what it says.

Dunbarton  Oaks - Their online publications.

Oxford Text Archive - Whole bundle of stuff, some of which may be useful and/or interesting.

Bayeux Tapestry Online - The whole thing.

Ming shi-lu - vast translation of primary records of the Ming period of 1368  - 1640.

Hittites.info - useful site on the Hittites.

Greek, Roman and Byzantine Studies - a journal covering this topic.

Sino-Japanese Studies - archive of this journal.

Illuminated Manuscripts - resource from the British Museum.

Medieval Archaeology - journals available.

Ancient Egypt - about the kingdom of the Nile.

The Greek Age of Bronze - unsurprisingly about bronze age Greece.

Samurai Archives - a samurai resource.

Ethos - British Library resource for electronic theses.

Early Modern Warfare Society - as described :-)

Spanish Tercios - excellent site about the famous formations.