alternatehistory.com

1 May
After some confidential discussions, Blair shakes loose around ~12,000 troops in twenty regiments. He argues that this is equivalent to 20,000 troops on paper, and roughly the same response comes from the NY governor (Edwin Morgan) who is not willing to reduce his already-scant forces much further (he does, after all, have the Royal Navy just offshore.)
As a result, the reinforcements sent south amount to 22,000 troops. This is useful, but the original hopes had been for nearly 40,000 to form an army to plug the gap left by Grant's being encircled and cut off.
This new force, the Army of the Barren, is to set up in northern Kentucky.

At about the same time, in Pennsylvania, three newly raised regiments come close to mutiny over their weapon situation. One regiment has been armed with absolutely awful weapons - fowling shotguns, blunderbusses, Indian-made muskets and rusty flintlocks originally derived from spares of the French Army of the 1770s all make an appearance. The other two are given relatively good smoothbore percussion muskets just back from repair, but there are only enough for one regiment - thus, five companies from each regiment are armed with guns and the other five are told to pick up the discarded weapons in battle.
After some hours of tense talks, the guns are divided between two of the regiments and the third will wait in the camps until some firearms can be procured for them.
Morale remains low.

The arc of forts from Rockville to the Potomac runs out of food. The ranking officer considers surrender to be the only viable option, and accordingly passes word down the line that they will need to be ready to destroy their stocks of weapons and ammunition.