This text is used for the Lectionary Year C on March 6, 2016.
In the lectionary, Joshua 5:9-12 is linked with Psalm 32, 2 Corinthians 5:16-21 and Luke 15:1-3, 11b-32. If you are following the lectionary this would be the fourth Sunday in Lent. As such, it leans into transitions. The Joshua and 2 Corinthians texts also reflect the theme of transitions.
It is easy to focus on the dramatic battles of the Book of Joshua and miss the liturgical or ritual elements embedded in the book. The Book of Joshua is about transitions. The first chapter of the Book of Joshua announces Moses is dead (Jos 1:2). The story that began with the crossing of the Sea of Reeds (Exodus 14) closes or transitions at the crossing the Jordan (Joshua 3:1-17). The story that began with the gift of manna (Exodus 16:4-30) comes to an end in the book of Joshua (5:12).