When Port Hudson surrendered, two of the nine-months' regiments had already served beyond their time. The 4th Massachusetts claimed its discharge on the 26th of June, the 50th four days later, insisting that their time ran from the muster-in of the last company; but, being without information from Washington on this point, Banks counted the time from the muster-in of the field and staff, and therefore wished to hold these regiments respectively eighty-one and forty-two days longer, or at all events until the receipt of instructions or the end of the siege. To this view officers and men alike objected, many of them so strongly that whole companies refused duty. They were within their lawful rights, yet, better counsels quickly prevailing, all consented to stay, and did good service to the last. Of seven other regiments the term of enlistment was on the point of expiring. They were the 21st, 22d, 24th, and 26th Maine, the 52d Massachusetts, the 26th Connecticut, and the 16th New Hampshire. These nine regiments were now detached from the divisions to which they belonged and placed under the orders of Andrews to form part of the garrison of Port Hudson until the transports should be ready to take them home by sea or river. As soon as the river was opened, Grant responded freely to all the urgent demands made upon him for steamboats, forage, beef, telegraph operators, and so on. He sent Ransom to occupy Natchez, and about the 25th of July Herron arrived at Port Hudson with his division of two brigades, 3,605 effectives, with 18 guns. Herron's command, the victor of Pea Ridge and Prairie Grove, formerly known as the Army of the Frontier, had been called to the aid of Grant at Vicksburg. It came to the Gulf as Herron's division, but was presently, by Grant's orders, merged in the 13th Corps as its Second Division. At the close of July, in response to Banks's urgent appeals for more troops to replace the nine-months' men, Halleck ordered Grant to send down a corps of 10,000 or 12,000 men. Accordingly, between the 10th and 26th of August, Grant sent the reorganized Thirteenth Corps to Carrollton. Ord, the proper commander of the Thirteenth Corps, took sick leave, and the corps came to Louisiana under the command of Washburn, with Benton, Herron, Lee and Lawler commanding the divisions, and Colonel Mudd the brigade of cavalry. All told, the effective strength of the corps was 778 officers and 13,934 men; total, 14,712.