No just no my friend , Old Mac was convinced Lee outnumbered him by most accounts Mac believed Lee had over 100k men
McClellan's estimates were some of the lowest going around.
During the Maryland campaign McClellan's estimates were that Lee may have 100,000 PFD (= 120,000 Present), and this was actually reasonable. Lee's moving column was about 76-78,000 PFD, excluding the slaves driving his trains and performing logistics duties in the camps.
The breakdown shows that aside from one line on the estimate the estimate was very accurate. The extra line was basically forces left at Richmond and forces in West Va that could have joined.
However, at Sharpsburg McClellan believed he'd caught a fragment of the enemy force, and hence he aggressively attacked it before all his own force was up. At dawn on the 16th September McClellan has only two divisions in line, the two leading divisions from the pursuit the day before, Richardson and Sykes. Hooker's 1st Corps reached the vicinity of Keedysville shortly before night and bivouacked north of the town. The remaining 2 divisions of 2nd Corps was spread along the road at nightfall back to Boonsboro. 12th Corps was from Boonsboro back. Positions at dawn on 16th September were:
I personally think he never intended to move regardless of the mysterious Ammo crates that of course were also Lee's problem.
McClellan went back to his camp fully intending to renew the attack in the morning, and issued orders to that effect. Back at his HQ camp his subordinate commanders met him and told him the state of their commands. After they reported McClellan suspended his attack order to wait for two more divisions to come up, and for his artillery to be resupplied. His artillery had literally run dry. Everything was late.
McClellan gets low on ammo cant move must wait for more men and ammo resupply regardless of the fact that Lee must have been low on ammo as well + his men had just done a 15 day footslog and bust a gut to converge on Sharpsburg and fought a battle where nearly every CSA unit was engaged.
Or are you telling me the logistics of the CSA were far superior to the Union logistics?.
No, but they had fallen back on their supply lines, and McClellan had advanced from his. The destruction of the railroad bridge across the Monocacy River meant that from crossing that on the 13th September his army was living solely on what it carried with them.
The engineers repaired the railroad bridge early on the 18th. The first train that runs over it is the well delayed ammunition supply train, which unloads at Hagerstown,
15 road miles from McClellan's army, having arrived there at 1300 hrs on the 18th. The wagoners pull off a minor miracle and move the ammunition from Hagerstown to the army during the night, and on the morning of the 19th McClellan's artillery is back in action.
The rebels, meanwhile, had a bonanza from Harper's Ferry. Whilst on the 17th they did run low on ammunition, like McClellan, they were able to draw upon Harper's Ferry and resupply from there that night. They had their guns well stocked for action on the 18th, and the Federals lacked ammunition.