 Attempting to list the equipment available to the DRC 's land forces is difficult ; most figures are unreliable estimates based on known items delivered in the past . The IISS 's Military Balance 2007 and <unk> 's Concise World Armies 2005 give only slightly differing figures however ( the figures below are from the IISS Military Balance 2007 ) . Much of the Army 's equipment is non @-@ operational due to insufficient maintenance — in 2002 only 20 percent of the Army 's armoured vehicles were estimated as being serviceable . 
