American Forces in Action Series presents detailed accounts of particular combat operations of United States forces. Twelfth in the series of studies on particular combat operations, St-Lo is the story of a corps in First Army during the bitter July battle that led up to and made possible the great breakthrough from the Normandy beachheads. This was the period of the most intense hedgerow fighting. XIX Corps' part in it has been chosen to illustrate this type of combat. This document addresses the July offensive, XIX Corps attacks west of the Vire, opening attack on St-Lo, XIX has slow going, and the last phase of the battle.