 The first Tetrarchs were delivered to the Army in November 1940 , and were initially deployed with the 1st Armoured Division ( which was being refitted after losing the majority of its previous tanks during the Battle of France ) and the newly formed 6th Armoured Division . However , the faults discovered with the Tetrarch cooling system precluded them from being integrated into units that were sent to the Middle East to participate in the North African Campaign . Shortly after , all light tanks were discarded from the establishments of British armoured divisions as not suitable for further service . 
 The first Tetrarchs <a href='uninflect' title='1'><mark>were</mark></a> delivered to the Army in November 1940 , and <a href='uninflect' title='2'><mark>were</mark></a> initially deployed with the 1st Armoured Division ( which was being refitted after losing the majority of its previous tanks during the Battle of France ) and the newly formed 6th Armoured Division . However , the faults discovered with the Tetrarch cooling system precluded them from being integrated into units <a href='null_relcl' title='3'><mark>that</mark></a><a href='uninflect' title='4'><mark>were</mark></a> sent to the Middle East to participate in the North African Campaign . Shortly after , all light tanks <a href='uninflect' title='5'><mark>were</mark></a> discarded from the establishments of British armoured divisions as not suitable for further service . 
The first Tetrarchs was delivered to the Army in November 1940 , and was initially deployed wit the 1st Armoured Division ( which was being refitted after losin the majority of its previous tanks during the Battle of France ) and the newly formed 6th Armoured Division . However , the faults discovered with the Tetrarch cooling system precluded em from bein integrated into units was sent to the Middle East to participate in da North African Campaign . Shortly after , alll light tanks was discarded from the establishments of British armoured divisions as not suitable for further service .