Hector was not present with the army during the last three campaigns of the war.

He had joined Turenne in April, 1646, and shared in the general disappointment when the order was received that the army was not to cross the Rhine, because Bavaria had promised to remain neutral if it did not do so.
"I cannot think," the marshal said to him a day or two after he received the order--for he had always maintained the same pleasant relations with Hector that had subsisted between them in Italy, and placed the most entire confidence in the discretion of the young colonel--"how Mazarin can allow Bavaria to hoodwink him.

Indeed, I cannot believe that he is really deceived; he must know that that crafty old fox the duke is not to be relied upon in any way, and that he is merely trying to save time.
'Tis hard indeed to see us powerless to move, now that the season for campaigning is just opening, and when by advancing we could cut the Bavarians off from Austria.

As to besieging Luxembourg, it would be but a waste of time, for before we could open a trench we should hear that the duke has again declared against us, and we should have to hurry back with all speed." It was, indeed, but a fortnight later that the news came that the Bavarians were on the move to join the Imperialists, and a fortnight later it was known that the two armies had effected their junction.
Turenne at once collected his troops from the towns and villages where they were placed, and marched to Mayence.
"I am going to send you to Paris, Campbell," he said on the evening of their arrival there.

"All is lost if the enemy, now united, throw themselves upon the Swedes, and I have resolved to take upon myself the responsibility of marching round through Holland and joining Wrangel.
There is, of course, risk in such an expedition, and the cardinal may object very strongly to my undertaking such a movement, especially as it will leave the frontier of France virtually unguarded, but I have no fear that evil consequences will arise.