Complex sentence: Thomas A. Scott, vice-president of the Pennsylvania Railroad severed as an Assistant Secretary of War during the period 1861-1862, whose January 1862 report on military transportation anticipated the creation of the USMRR.
Split into simpler sentences: Thomas A. Scott, vice-president of the Pennsylvania Railroad severed as an Assistant Secretary of War during the period 1861-1862. In January 1862 Scott prepared a report on military transportation that anticipated the creation of the USMRR.