Training problems were also exposed. Mobile Tank Destroyer units had not been trained to work together as a battalion - despite the doctrine being so clearly to the fore, actual training of the units was done at a small unit level. Also at issue was the performance of the organic reconnaissance units, who had never experienced such extended distances in training as they were forced to operate in North Africa. With an inability to work together as a battalion, along with the poor performance of the organic reconnaissance units, many vehicles were lost in the Battle of El Guettar.