In the last year of the war, with Grant as Union General-in-Chief, Lee was firmly on the defensive, and could only react to Grant's strategy of attrition.
He was not in a position to mount one of his bold, aggressive thrusts (especially as these really needed Stonewall Jackson, now dead), and Lee himself was suffering from Heart disease, misdiagnosed as rheumatism, and had confided to a few close friends that he was past his best.
As 1864 unfolded, President Lincoln decided to place General US Grant in charge of the Union's war efforts to end the Southern rebellion. Grant was made the Union's general in chief with the title of Lieutenant General. He would be based in the Eastern Theater which included Virginia and Lieutenant General Robert E. Lee and his Army of Northern Virginia. Lee knew he would be faced with the task of facing US Grant and a huge Union army. Lee believed he had to prepare for Grant's renewed efforts to control Virginia. Lee therefore began to add to the already formidable fortifications protecting Richmond and the main source of Richmond's supplies from Petersburg. Lee's goal was to defend Richmond and Petersburg. He believed that the 1864 US presidential elections might bring forth a peace agreement between the North and the South.What ensued was Grant's Overland campaign. It was a costly series of battles that began in the Spring of 1864. Some pundits blamed Grant for losing too many soldiers as he continued heavy assaults on Lee's fortified army.
Because there was low civilian morale in the North, as Grant's strategy did not look successful through the summer of 1864 (Election Year). Lincoln's chances were rescured by some battlefield successes in the Fall.
He planned a war of attrition-that is, to continue fighting until the south ran out of men supplies, and the will to fight
Petersburg
After Grant became General-in-Chief in March 1864. Grant simplified the Union strategy, and said that he would take on Robert E. Lee, while Sherman was to destroy the Army of Tennessee under Joe Johnston (later John Hood). Sherman did not succeed in doing this. But his alternative plan - crossing Georgia and the Carolinas almost unopposed - did have the effect of shortening the war.
Attrition. Keeping Lee pinned-down and letting him run out of manpower. (It was not immediately after Gettysburg. Grant did not occupy the top job till March 1864.)
Robert Heathcote was born in 1864.
Robert Loveman was born in 1864.
Robert A. Hefner was born in 1864.
Robert Wynyard died in 1864.
Robert Fane died in 1864.
Robert Lorimer was born in 1864.
Robert Prendergast was born in 1864.
Robert Zimmermann - painter - died in 1864.
Robert Smythe Hichens was born in England in 1864.
Robert Langton Douglas was born in 1864.
Robert Edmund Sherwood was born in 1864.
Robert Seymour Conway was born in 1864.