These leaders, in turn, report to the US command structure. The host nation may provide military or paramilitary units to support US requirements for NBC defense or smoke. Some supplies and equipment such as decontaminants may be more readily available locally than through the US logistics system. The NATO alliance covers a wide range of cultures, languages, governments, allied forces, terrain, and climate. Long-standing agreements and established headquarters with international staffs ease the difficulty of using chemical units in this diverse environment.
Most chemical units operate in a national organization at corps level or below.
Cross attachment of allied chemical units is achievable through equipment and procedural interoperability. Corps or theater chemical units can have a specific mission to support allied units. In this circumstance US Army chemical units would be under operational command of the allied maneuver unit. Each allied nation provides combat service support to its own forces. However, US chemical units can obtain common supply items from allied units and, in turn, provide items to them.