During a skirmish at Weedon Station on July 17 -- 18 , 1864 , the regiment was heavily engaged .
Confederate troops had succeeded in penetrating the unit on the 90th 's right flank and were in the rear of the 90th .
During a skirmish at Weedon Station on July 17 -- 18 , 1864 , the regiment was heavily engaged and Confederate troops had succeeded in penetrating the unit on the 90th 's right flank and were in the rear of the 90th .