Despite his best efforts to give Shuyler all of the additional troops that he asked for by the end of summer in 1776, Washington continued to face systemic challenges of recruiting and retention in the Continental Army.
"The short Inlistment of our Troops has been the Source of some of our Misfortunes & of Infinite Trouble and Difficulty already, And I am not Without Apprehension that sooner or later must prove of fatal Consequence. I have wrote my Sentiments very fully to Congress upon this Subject, two or three Times—In a late Letter, I have urged the Expediency of a permanent Army during the War. The Necessity is too Obvious to require Arguments to prove It. I think It will be adviseable to recruit out of the present Army as fast as possible. But I fear the Progress will be but small. The Bounties Given by the different States to raise their Quotas of Men for so short a Time, must have a pernicious Tendency. Many will refuse to inlist, as that allowed by Congress is so low, in Hopes of Exacting more"
General Washington to General Schuyler, 4 September 1776www.founders.archives.gov