reaching the end of their service lives, with many being sold onto the civilian market from the late 1990s. In 1994 Land Rover created the Defender XD (XD= extra duty) to replace and complement these vehicles. Powered by 300Tdi engines, the XD has a much stronger chassis, with fibre webbing around the welded joints in the chassis and around stress points to massively increase load capacity. The XD was available both in Defender 90 and 110 forms and is known to the British Army as the Land Rover Wolf. Usually soft or hard tops, they are used for patrol, communications and supply duties. 90XDs are less common, but are generally ordered as soft top or hard top vehicles for light liaison and communications. Short-wheelbase vehicles lack the load capacity needed by modern armies, and the increased power of heavy-lift helicopters has made the larger 110s easily air-transportable- a historic advantage of the smaller, lighter 90. Land Rover offered its "core" military Defenders with the 300Tdi engine rather than the more powerful but more complicated Td5 engine offered in civilian vehicles. The 300 Tdi Defender went into service in the "Green Fleet" from 1998. Before the 300Tdi engine was introduced, military Land Rovers were offered with 2.5-litre petrol and diesel engines, as well as the 3.5-litre V8 petrol. Trials with the Td5 engine proved it to be reliable in battlefield conditions. However, initially it was decided that servicing and repairing its electronic control systems should they fail was too complicated and reliant on having diagnostic computers available. Land Rover were also unable to guarantee they could make the Td5 resistant to the electromagnetic pulse (EMP) generated by a nuclear weapon. However, following successful trials by the Australian Defence Force of the TD5 Landrover, the British MOD purchased a small fleet of TD5 Landrover Defender 110s for its "Green Fleet" between 2000 and 2002. These were specially converted for the MOD by Landrover Specialist Vehicles. They were plated with UK military registration plates and painted IRR green. Most of these vehicles were deployed in the Falklands as troop carriers and communications vehicles for use by the Royal Marines and UK Special Forces. A small number of TD5 Defender 110s were also ordered for the Royal Navy. These were painted navy blue and deployed to the Falklands. Of these Royal Navy vehicles a few were later re-painted IRR green and reassigned to Royal