 Complete the following phrase:  The First Army was one of the major units of the Romanian military in both World War I, partaking in such operations as the Romanian offensive in Transylvania in 1916 and the Battle of Mărăşeşti in 1917, and World War II, seeing action on the Eastern Front, particularly after the 23 August 1944 Coup, when the First Army fought westwards alongside Soviet units in battles such as that of 