Here they were met by the Woburn militia, some 200 strong. This marked the fiercest fighting on Battle Road.
“We came to Tanner Brook, at Lincoln Bridge, and concluded to scatter and make use of the trees and walls for to defend us and attack them,” Maj. Loammi Baldwin of Col. David Green’s 2d Middlesex Regiment recalled. “We pursued on flanking them . . . I had several good shots. The enemy left many dead and wounded and a few tired . . .” It was not a purely one-sided affair. The men in the British column were able to use the cover provided by the sunken road to push through the ambush site. The light infantry flankers rushed from tree to tree, fence to fence, inflicting casualties on the Woburn militia.
https://www.nps.gov/mima/learn/historyculture/elm-brook-hill.htm
Arlington Historical Society