What would disturb General Wilson 13 April 1941?

 So what would cause General Wilson to be worried on 13 April 1941? There was a road at Grevena that Wilson wanted to be able to use for the 1st Armoured Brigade to withdraw. Word was, however, that the road was jammed with slow-moving Greek troops. They were described as "plodding south". What they thought that they had heard was that the 12th and 20th Greek divisions "had disintegrated" while trying to move to the Siatista and Klisoura passes. They had heard, though, that the Greek Cavalry Division was "well-established in the Pisoderion pass" in the north. 

General Wilson complained that the "Greek Central Macedonian Army" had failed in the process of executing the withdrawal. He also complained that the Greek 12th and 20th Divisions had never been able regain control over their men after they left the "Vermion positions". The disorganized divisions were now simply intent on reaching Athens.

The Australian historian commented that he expected that the Greek divisions were not really disorganized and that was simply a mistaken impression by the British based on the poor equipment and their appearance on the road. The historian also thought that what they were concerned about were service troops walking alongside the roads and not actually combat units.  This is based on the account in "Greece, Crete, and Syria" by Gavin Long.