The term 'Bolshevik Foe' refers to the Tsarist regime in Russia before the Bolshevik Revolution of 1917. The TSAR was the absolute ruler of Russia and was represented by the Tsarist government. The TSAR was also known as the TSAR of All the Russias, and his rule was characterized by autocracy and repression. The TSAR was overthrown in the February Revolution of 1917, and the Bolsheviks took power in October of that same year. The TSAR and his government were the main opponents of the Bolsheviks during the Russian Civil War, which lasted from 1918 to 1921. The crossword solutions for the term 'Bolshevik Foe' are TSARIST (7 letters) and TSAR (4 letters).