Matthew Sand has been attached to rewrite the historical action drama “Brothers in Arms,” based on the book about the only black U.S. tank unit to fight in the European theater during World War II. Denzel Washington is attached to direct as well as produce alongside Alcon’s Broderick Johnson and Andrew Kosove. David Chisholm and John Sayles wrote the last script attached to the project before Sand was brought on for a rewrite. Based on the work by Kareem Abdul-Jabbar and Anthony Walton, the book tells the story of how the unit that spearheaded the Allied Forces’ drive eastward toward Germany during the Battle of the Bulge while battling prejudices…