Found it,....here is an excerpt from the Army institute of Heraldry (a pretty cool, site BTW)
“The bayonet is representative of its introduction to American arms at the Battle of Long Island 1776, by the Maryland Line and in the use of which it became famed throughout the War. It is also symbolic of the “Maryland 400” which by repeated charges and sustaining heavy losses delayed General Howe’s army, which enabled General Washington to successfully withdraw his defeated army across the Hudson River.”
http://www.tioh.hqda.pentagon.mil/Inf/175InfantryRegiment.htm