13. The swale demonstrates how certain units of the Irish Brigade (such as the 63rd New York) would have become exposed to Confederate fire from the Bloody Lane before other elements of the unit, such as the 29th Massachusetts to the right.

13. The swale demonstrates how certain units of the Irish Brigade (such as the 63rd New York) would have become exposed to Confederate fire from the Bloody Lane before other elements of the unit, such as the 29th Massachusetts to the right.