What was grant's greatest advantage going into the spring of 1864?

The "Overland Campaign" refers to the period (40 days) of fighting and clashes between the main generals of the Civil War: Lieutenant General Ulysses S. Grant for the Union and General Robert E. Lee for the Confederacy. They were times of strong competition and resistance of each of the parties.

The strength of Grant and his people was their firmness and clarity to neutralize Lee's army. Grant's campaign acted on the offensive having great military capacity. The general pattern of Grant's campaign was to use reflexive combinations of maneuver and strength to catch their opponents.

The year 1864 was an election year, and President Abraham Lincoln realized the adversities he faced and that no doubt slowed them down for a second term. To achieve this, he needed the Union armies to produce victories, to avoid winning a candidate willing to negotiate with the South.

richard nixon led the investigation that resulted in alger hiss being convicted of prejury.

there is no photo, therefore i can not answer your question.