table: The table is not exhaustive and primarily includes vehicles and EU-NATO member countries under the Conventional Armed Forces in Europe Treaty (CFE treaty). Unless otherwise specified. The CFE treaty only includes vehicles stationed within Europe, vehicles overseas on operations are not counted. The "main battle tank" category also includes tank destroyers (such as the Italian B1 Centauro) or any self-propelled armoured fighting vehicle, capable of heavy firepower. According to the CFE treaty. The "armoured fighting vehicle" category includes any armoured vehicle primarily designed to transport infantry and equipped with an automatic cannon of at least 20 mm calibre. According to the CFE treaty. The "artillery" category includes self-propelled or towed howitzers and mortars of 100 mm calibre and above. Other types of artillery are not included regardless of characteristics. According to the CFE treaty. The "attack helicopter" category includes any rotary wing aircraft armed and equipped to engage targets or equipped to perform other military functions (such as the Apache or the Wildcat). According to the CFE treaty. The "military logistics vehicle" category includes logistics trucks of 4-tonne, 8-tonne, 14-tonne or larger, purposely designed for military tasking. Not under CFE treaty. Air forces The air forces of EU member states operate a wide range of military systems and hardware. This is primarily due to the independent requirements of each member state and also the national defence industries of some member states. However such programmes like the Eurofighter Typhoon and Eurocopter Tiger have seen many European nations design, build and operate a single weapons platform. 60% of overall combat fleet was developed and manufactured by member states, 32% are US-origin, but some of these were assembled in Europe, while remaining 8% are soviet-made aircraft. As of 2014, it is estimated that the European Union had around 2,000 serviceable combat aircraft (fighter aircraft and ground-attack aircraft). The EUs air-lift capabilities are evolving with the future introduction of the Airbus A400M (another example of EU defence cooperation). The A400M is a tactical airlifter with strategic capabilities. Around 140 are initially expected to be operated by 5 member states (Luxembourg, France, Germany, Spain and Belgium). Guide to tables: The tables are sourced from figures provided by Flight International for the year 2020. Aircraft are grouped into three main types (indicated by colours): <span style="color:red">red</span style="color:red"> for combat aircraft, <span style="color:green">green</span style="color:green"> for aerial refueling aircraft, and <span style="color:silver">grey</span style="color:silver"> for strategic and tactical