Battalion "Vukovi" (Gospić) Mixed Artillery Battalion (Karlovac/Slunj) Air Defence Battalion (Benkovac) Engineer Battalion (Sinj) Reconnaissance Company Signals Company Logistics Company Training and Doctrine Command "Fran Krsto Frankopan" (Osijek) Command Company (Osijek) Infantry Regiment (Petrinja) Artillery Regiment (Bjelovar) Engineer Regiment (Karlovac) River Battalion (Osijek) Logistics Regiment (Benkovac) Basic Training Centre (Požega) Combat Training Center (Slunj) Combat Leaders Training Center "Marko Babić" (Udbina) Simulation Center (Zagreb) International Operations Training Center (Rakitje) Military Police Regiment (Ogulin/Karlovac) Signals Regiment (Karlovac) Military Intelligence Battalion (Zagreb) NBC Defence Battalion (Dugo Selo) Special Operations Forces Command (Delnice) Air Defence Regiment (Zadar) Command Battery (Zemunik) 1st Mixed Battalion (Zemunik) 2nd Mixed Battalion (Udbina) 3rd Mixed Battalion (Zagreb) Signals Battalion (Velika Gorica) Training Grounds Eugen Kvaternik Training Grounds (Slunj) Crvena Zemlja Training Grounds (Knin) Gašinci Training Grounds (Đakovo) Operational art and tactical doctrine Building on NATO's Partnership for Peace assistance programs and full NATO membership since 2009, the Croatian Army has embraced the alliance concepts of the 24-hour, three-dimensional battlefield and the employment of highly trained and motivated forces equipped to deploy rapidly and operate with flexibility as part of a larger multinational force. The Croatian Army is also working more closely with the air force and navy, resulting in more multi-phased operations with detailed ground/air coordination, but more needs to be done at all echelons to achieve a deeper level of jointness. In all of these activities, the land forces are in the lead. Equipment Modernization plans In past decade or so, Croatian Army underwent significant changes, modernisation of the armed forces albeit at the much slower pace then anticipated due to economic recession at the start of this decade, caused realignment of Croatia's priorities, Croatia's military subsequently faced significant cutbacks and reduction in expenditure or purchase of new armaments. However, as a result of NATO membership, Croatia agreed to fulfill some of the operational responsibilities towards NATO, this includes formation of two mechanised brigades, with emphasis on equipping both brigades with NATO standard equipment. Procurement of heavy weapons is still lagging behind due to shortage of funding for the armed forces, however donations by the US Armed Forces have helped Croatia to gap some of the shortfalls. Purchase of 126 Patria AMV APCs allowed for light mechanized brigade to replace old Yugoslav and Soviet era weapon systems that saw little use with in NATO. However, the Heavy Mechanized brigade still relies heavily on Soviet and Yugoslav-era weapons