David’s empire wasn’t.
” “the Israelites were never in Egypt, did not wander in the desert, did not conquer the land [of Canaan] in a military campaign and did not pass it on to the twelve tribes of Israel. Perhaps even harder to swallow is the fact that the united kingdom of David and Solomon, described in the Bible as a regional power, was at most a small tribal kingdom.” The new theories envision this modest chiefdom as based in a Jerusalem that was essentially a cow town, not the glorious capital of an empire.” Ze’ev Herzog, archaeologist from Tel Aviv University
http://archive.salon.com/books/feature/2001/02/07/solomon/index.html
See also:
Finkelstein, I. and Silberman, N.A. 2006. David and Solomon, In Search of the Bible’s Sacred Kings and the Roots of the Western Tradition. New York.
Finkelstein, I. and Silberman, N.A. 2001. The Bible Unearthed, Archaeology’s New Vision of Ancient Israel and the Origins of Its Sacred Texts. New York.