Generals Mackay and Freyberg would be involved with the move back to Thermopylae. Mackay would be responsible for protecting the New Zealand Division flanks as far as the line through Larisa. He would also be in command of the move of Savige Force, Zarkos Force, and Lee Force.
The 1st Armoured Brigade would protect Savige Force at Larisa as well as the 6th Australian Division. The armored brigade would be under the command of the 6th Australian Division.
General Freyberg would command Allen Foree, which would be following the route of the New Zealand Division. General Blamey took command of all of the engineers.
He planned to have a meeting at the junction of the roads to Katerini and Servia. The meeting would include Brigadier Steele, Colonel Lucas, and Colonel Clifton. Blamey's plan was based on the expectation that they would be able to slow the enemy enough to allow the 4th New Zealand Brigade to leave the Servia Pass, the 5th New Zealand Brigade to leave the Olympus Pass, and the 6th New Zealand Brigade would then leave Elasson on the night of 18 and 19 April. Savige Force and Allen Force moves would be coordinated with Generals Freyberg and Mackay.
You had the snow-covered peak of Mount Olympus lying between Allen's force "on the south bank of the Pinios". and the 5th Brigade, some 20 miles distant in the Olympus Pass. The 5th Brigade was sitting "on the north slope". There was a fighting force at Tempe that was "in the gorge".
This is based on the account in "Greece, Crete, and Syria", by Gavin Long.