 Lieutenant Bush's twelve-man military police unit arrived at the site from Los Alamos on December 30, 1944. This unit established initial security checkpoints and horse patrols. The distances around the site proved too great for the horses, so they resorted to using jeeps and trucks for transportation. The horses were used for playing polo. Maintenance of morale among men working long hours under harsh conditions along with dangerous reptiles and insects was a challenge. Bush strove to improve the food and accommodation, and to provide organized games and nightly movies.
