Prepare you victuals - The order was probably given with the knowledge that the manna would cease when the host crossed the Jordan Exodus 16:35, and possibly because amidst their preparations there might not be opportunity to gather it in sufficient quantity. Nor does it appear that manna ever formed the whole and sole sustenance of the people. (Compare Numbers 20:1 note.)

It is the view of the majority of commentators - Jewish and Christian, ancient and modern - that the "three days" here named are identical with those of Joshua 3:2; and that the command of Joshua in the text was not in fact given until after the return of the spies. Here, as elsewhere in the Hebrew historical books and frequently in the Gospels, the order of time is superseded by the order of thought. For the purpose if the writer was not historical merely; it was, on the contrary, mainly religious and theoretical. Intending, then, to exhibit God as accomplishing His promises to the covenant-people, he begins by informing us that God gave the word and set Joshua and the host actually in motion to take possession of their inheritance. Having placed this leading fact in the forefront, he returns to mention in Joshua 2 certain transactions closely relevant to the early stages of Joshua's conquests, but which had in fact happened before the camp was removed from the plains of Moab and immediately after the expiration of the thirty days' mourning for Moses. Deuteronomy 34:8. The order of events was probably the following - 3rd Nisan, the spies are sent out Joshua 2:1; 6th, the spies return Joshua 2:23; 7th, the camp is removed from Shittim to the bank of Jordan Joshua 3:1, and the command Joshua 1:11 is issued; 10th, the river is crossed Joshua 4:19.

Joshua 1:11 Parallel Commentaries

Five Kings in a Cave
TEXT: "And it came to pass, when they brought out those kings unto Joshua, that Joshua called for all the men of Israel, and said unto the captains of the men of war which went with him, Come near, put your feet upon the necks of these kings. And they came near, and put their feet upon the necks of them. And Joshua said unto them, Fear not, nor be dismayed, be strong and of good courage: for thus shall the Lord do to all your enemies against whom ye fight."--Joshua 10:24-25. The history of the …
J. Wilbur Chapman—And Judas Iscariot

The Great Commission Given.
(Time and Place Same as Last Section.) ^A Matt. XXVIII. 18-20; ^B Mark XVI. 15-18; ^C Luke XXIV. 46, 47. ^a 18 And Jesus came to them and spake unto them, saying, All authority hath been given unto me in heaven and on earth. ^b 15 And he said unto them, Go ye ^a therefore, ^b into all the world, and preach the gospel to the whole creation. ^a and make disciples of all the nations, baptizing them into the name of the Father and of the Son and of the Holy Spirit: 20 teaching them to observe all things …
J. W. McGarvey—The Four-Fold Gospel

Joshua
The book of Joshua is the natural complement of the Pentateuch. Moses is dead, but the people are on the verge of the promised land, and the story of early Israel would be incomplete, did it not record the conquest of that land and her establishment upon it. The divine purpose moves restlessly on, until it is accomplished; so "after the death of Moses, Jehovah spake to Joshua," i. 1. The book falls naturally into three divisions: (a) the conquest of Canaan (i.-xii.), (b) the settlement of the …
John Edgar McFadyen—Introduction to the Old Testament