M5/M5A1 Halftrack -The M5 halftrack series was manufactured by International Harvester when production facilities for M3 halftracks were determined to be inadequate to meet the needs of the Army and for export.  Most M5 series halftracks were exported to the UK and to the Soviet Union.  After World War Two M5 halftracks were widely used by NATO nations for many years.  One of the most notable features of the M5 series is the rounded rear corners compared to the M3 series of halftracks.