Sales of arms and military services by the world's 100 biggest defence companies came to $374.8bn last years. Though sales rose by only 1.9%, that was the first annual increase since 2010, spurred by regional tensions and ongoing military campaigns. American and Europe companies  dominate the industry , accounting for 82.4% of all arm sales,  although domestic demand boosted sales by Korean firms. Lockheed Martin was the world's largest arms company in 2016, with revenues from arms sales of $40.8bn(an increase of 10.7% on the year before ). It was helped by the more deliveries of its F-35 combat aircraft and the acquisition of Sikorsky, a helicopter-maker, at the end of 2015.