Here are some Neo-Babylonian infantry from the archives, mixed spearmen and archers, they're Newline Designs figures. I'm currently reading Mark Healy's The Ancient Assyrians, Empire and Army, 883-612 BC. This is a hardback updated and expanded version (320 pages) of his 1991 Osprey book The Ancient Assyrians. It still has the colour illustrations by Angus McBride, as well as additional illustrations and full page photographs from the British Museum. Definitely worth getting if you are interested in the Neo-Assyrians. Also highly recommended are Eckart Frahm's Assyria: The Rise and Fall of the World's First Empire and Roland Sennewald's The Art of War in Ancient Assyria: The Sargonid Dynasty at War from Sargon II to Ashurbanipal (722-627 BC). Sennewald has an accompanying volume The Enemies of the Assyrian Sargonid Empire to be published this year. Tamas Dezso's three volume The Assyrian Army seems to be out of print now but might be available from second hand booksellers.