... his attack. This violation of General Gardner's orders enabled Grierson to get a long start on a new track, heading for Greensburg, on the Baton Rouge and Tangipahoa road. When it was learned at Port Hudson that Grierson had escaped our cavalry, two regiments of infantry and a section of artillery were dispatched to occupy the Tangipahoa and Baton Rouge road and intercept him, should he try to get in th...