The Deutronomistic school would say between 931 BCE and 622 BCE, plus or minus a few decades. This is the conclusion I have come to after a bit of research. I used this --
http://books.Google.com/books?id=FxFZxCIc8OoC&pg=PA178&lpg=PA178&dq=historicity+joshua&source=bl&ots=xDxgXdV4w_&sig=D4G7XK6a8fHVJou-pebkBspJ_Gs&hl=en&ei=zrjcStG_HZON8AacvNS3BQ&sa=X&oi=book_result&ct=result&resnum=4&ved=0CBkQ6AEwAw#v=onepage&q=historicity%20joshua&f=false
------------------------
The Book of Joshua is considered part fo the Deuteronomic History (Joshua, Judges, 1 Samuel, 2 Samuel, 1 Kings and 2 Kings) written in Jerusalem during the seventh-century BCE reign of King Josiah, but based on earlier oral and written traditions.
The Book of Joshua is now recognised as being part of the Deuteronomic History, which consists of Joshua, Judges, 1 Samuel, 2 Samuel, 1 Kings and 2 Kings, an integrated series of books written in the same style and relatively late version of the Hebrew language. The Deuteronomic History, including the Book of Joshua, was written in the seventh century BCE.
Tradition states that the Book of Joshua was written by Joshua in 1244 BCE, shortly before he died.
Theories of anonymous later authorship rely upon unproven textual analysis and are not backed up by any physical evidence.
See also:
Refuting late-authorship and other Biblical-criticism hypotheses
1355 b.C.e
The book was written for the Israelites.
the book was written in about 1404 BC
Joshua Marie Wilkinson has written: 'The Book of Truants & Projectorlight' 'The Book of Whispering in the Projection Booth' 'A Ghost as King of the Rabbits'
Joshua Allen Hunter has written: 'My old scrap book ..' -- subject(s): Commonplace-books
The old testament book of Joshua was written to give an account of the events following the death of Moses and the Israelite crossing of the Jordan to the 'Promised Land'. The book of Joshua is an immensely important for the life of all believers because it shows how a man whom never had any leadership experience, filled with fear, learned to trust in God wholehearted and how God revealed himself more and more to him.
Joshua N. Danforth has written: 'Memoir of William C. Walton' -- subject(s): Accessible book
For the reader to understand what Christianity is.
The book of Judges was written as a history during the time of the Judges, which occurred between the time of Joshua and the prophet Samuel. It was written to the Israelites .
Joshua William Brooks has written: 'Elements of prophetical interpretation' -- subject(s): Accessible book, Prophecies, Bible, Second Advent
Ancient tradition has it that the book was written by Joshua himself, completed after his death by Eleazar the high priest and his son Phinehas. Joshua contains vivid material, written in the first person, suggesting that the author was an eyewitness.
Yes Joshua was Moses successor, and it was Joshua who lead the Jews into the promised land.
Walter Buell has written: 'Joshua R. Giddings' -- subject(s): Accessible book