Passage: Brigadier General Anthony McAuliffe sent the 501st PIR southeast through Bastogne at 06:00 to develop the situation. By 09:00, it had advanced and deployed on either side of the highway to Magéret and Longvilly, where the Panzer-Lehr-Division (Armored Training Division) was engaged in an all-day action to destroy the armor-infantry combat teams assigned to slow the German advance. The 506th followed shortly thereafter, its 1st Battalion was sent to Noville to reinforce Major Desobry's team from the 10th Armored CCB while the other two battalions were ordered to act as reserves north of Bastogne. The 502nd PIR marched north and northwest to establish a line from Champs east to Recogne, while the 327th GIR, newly arrived, protected the division service area southwest of Bastogne until German intentions could be deciphered.

Question: When was the 501st PIR sent?
06:00