what were his biggest accomplishments

From starting out at West point to his graduation, R.E. Lee was to all extents...average. It was later on that in true combat he proved his mettle and apptitude for war. He never truly wanted to fight for the Confederate States of America; he vowed to protect his beloved state of Virginia. And due to the inability of the government and the Union Armies subsequent invasion, he went home to defend his people and his state. The greatest mistake Lee ever made was at Gettysburg. He ignored wise council and pressed the attack. However, while the outcome was anything but assured; Lee fell back into his former mediocre ways and held back.

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how did he contribute to the civil war

                He commanded the Army of Northern Virginia so successful at first that Britain and France came close to granting recognition to the Confederacy. After his colleague Stonewall Jackson was killed at Chancellorsville, neither he nor his army was quite the same again, and he also confided to a few close friends that he was physically past his best.
                In the last year of the war, Grant managed to keep him on the defensive and eventually took his surrender at Appomattox - the notional end of the Civil War. Although he had been appointed General-in-Chief of the Confederates by then, it was too late to make any difference.



"What did Robert E Lee contribute to the Civil War."  
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how many battles did he win/lose

Lee won; Chancellorsville, Cold Harbor, Fredicksburg, Spotsylvania, The Wilderness, Seven Days Battles, Second Manassas. He fought a much larger army under McClellan to a draw at Antietam, and lost at Gettysburg, Petersburg, and Appomattox.

"How many battles in the civil war did Robert E Lee win."
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