Jeff. I think you will find that Market Garden was suggested by General Montgomery. As General Eisenhower was Supreme Allied Commander it would have to be under his approval. I think it was a risk worth taking. If it had succeeded it would have considerably shortened WWII. The operation was dogged by bad luck, bad weather & hasty planning but almost came off.
Market Garden was a combined operation in 2 parts "Market" & "Garden". All available Allied forces were involved.
The essential task of the airborne forces involved was to seize intact the bridges over the canals and rivers en route, notably those at Son, Vegel, Grave (over the River Maas) and Nijmegen (over the River Waal) and finally the Rhine road bridge at Arnhem. This part of the plan was codenamed Operation "Market".
The "Garden" part of the plan was the land offensive by the armour of Lieut-General Horrocks' XXX Corps and other elements of the 2nd Army.
Operation Market was to be carried out by the 1st Allied Airborne Army under the command of General Browning. This included
the US XVIII Airborne Corps
82nd Airborne Division
101st Airborne Division
the British 1st Airborne Corps
1st Airborne Division
1st Parachute Brigade
4th Parachute Brigade
1st Airlanding Brigade
1st Polish Independent Parachute Brigade
The Americans were to open the corridor from Eindhoven to Nijmegen, whilst the British 1st Airborne Division under Major-General R.E. Urquhart were to seize the bridge at Arnhem.
The 2nd Army was expected to reach Arnhem in 48 hrs.
http://www.nntk.net/arnhem_1944/market_garden.htmlIf you're interested in this subject I can recommend the book "A Bridge Too Far" by Cornelius Ryan & the film based on it. My late father-in-law who was involved in the operation thought the film was very well done. He particularly liked Edward Fox's portrayal of Lt. Gen. Brian Horrocks who was his commander.