Hi Nancie,
American Army Units
There were no intact regiments. They all had accompanied General Izard to Niagara.

77 men from a variety of regiments,
100 from the 15th
200 from the 13th
1,500 from the 6th, 29th, 30th, 31st, and 34th regiments
50 artillery men
700 New York militia
2,500 Vermont militia

More than 500 of the 1,927 regulars were sick in hospital. The vast majority of the 700 New York Militia had gone before the Vermot militia arrived."

Source is Appendix A, "The Final Invasion: Plattsburgh, the War of 1812's Most Decisive Battle", by Colonel David G. Fitz-Enz, 2001, page 197. Transcribed by Jan