Some bacteria, such as Deinococcus, which stain gram-positive due to the presence of a thick peptidoglycan layer and also possess an outer cell membrane are suggested as intermediates in the transition between monoderm (gram-positive) and diderm (gram-negative) bacteria.
Further information: Battle of Five Forks. The decisive Battle of Five Forks, was fought on April 1, 1865, southwest of Petersburg, Virginia, around the road junction of Five Forks in Dinwiddie County, Virginia. Five Forks was a critical crossroads that led to the remaining Confederate supply lines.
The same week the Union took Fort Pulaski, General Ulysses S. Grant won a costly but decisive victory at Shiloh, Tennessee on the Tennessee River, the bloodiest battle of the war so far (over 23,000 casualties from only 100,000 soldiers), chasing the Confederacy out of western Tennessee.