The Mack Model NR was a heavy truck constructed for military use from 1940 to 1945 by the Mack Manufacturing Corporation of New York U.S.A. The Model NR was mainly used to tow trailers carrying heavy equipment such as tanks and large bulldozers. It was also used to tow heavy field guns. Its wide bogie axles and extra large tires were ideal for desert service, allowing them to "float" on the sand. Many Model NRs were supplied under the Lend-Lease Program...