Sokovia. Sokovia was a landlocked Eastern European nation. It had once been a small, mountainous, impoverished, and unstable country bordering Slovakia and the Czech Republic. A massive research institute. After World War II, Hydra members had hidden within the country and established secret bases. Hydra's remaining forces built an underground compound in Sokovia, while their agents still disguised themselves as loyal S.H.I.E.L.D. agents. After eliminating S.H.I.E.L.D.'s Hydra agents, Nick Fury began dealing with Hydra in Sokovia.