S.P.E.A.R. is a Chinese intelligence agency in the Marvel universe.
After the alien invasion by the intergalactic warlord Thanos and his army (the Black Order), China decided it needed its equivalent to S.H.I.E.L.D. and created the intelligence agency S.P.E.A.R. It is an organization that has technology and equipment that is roughly equivalent to that possessed by the American intelligence agency S.H.I.E.L.D. and therefore far superior to that possessed by most intelligence agencies, law enforcement organizations, and militaries in the world.
The world became aware of the organization when the would-be conqueror Gorgon and his ninja death cult (The Hand) attempted the conquest of China by using a formerly sleeping 400 mile long dragon (used to be under the island of Madripoor). S.P.E.A.R. and its team of superheroes (Ascendants) did battle with the invaders and were assisted by The Avengers and S.H.I.E.L.D.. Together they defeated the dragon and repelled the Hand invasion.
The S.P.E.A.R. is based on a colossal airborne city / flying fortress, called "The Circle". Within are 150,000 men and women, and the Ascendants. It also carries a squadron of 16 airships.