World War II was a global military conflict that lasted from 1939 to 1945, involving most of the world s nations — including all major powers — organized into two opposing military alliances: the Allies and the Axis. It was the most comprehensive war in history, with more than 100 million troops mobilized. The Battle of Monte Castello marked the presence of the Brazilian Expeditionary Force (FEB) in the conflict. It lasted three months, from November 24, 1944 to February 21, 1945, and is part of the 2nd phase of the Operation to Break the Gothic Line (in the sector of responsibility of the IV Corps of the V US Army), in the Italian Campaign. In the battle simulation, in addition to correcting the flaws mentioned in my study, I will present adaptations in the organization of the Brazilian Expeditionary Force, one of the main ones being that it had been structured as an Army Corps, with two of the three infantry divisions foreseen in the initial agreement for Brazil s entry into the war.