War engulfed Central America for another year in 1984. Over 150 thousand people have been killed and some 1.5 million people displaced on the isthmus since 1979. During the year the number of combatants grew, as did the quantity and sophistication of their weaponry. The United States stepped up its involvement in the region, strengthening both the Salvadoran government and the anti-Sandinista rebels, but the warfare continued to contribute to superpower tensions, Western alliance unease, and U.S.-Latin American discord.