In the September 1998 national elections the CDU/CSU and FDP coalition was swept from office by Gerhard Schröder and his SPD, ending 16 years of conservative government under Kohl. In October the SPD formed a coalition with the environmentalist Green Party, which had the third strongest showing in the elections. This Red-Green coalition, as it came to be called, marked the first time that the Green Party had entered Germany’s national government. The new government’s legislative program included measures against unemployment, reforms to ease the process by which immigrants become German citizens, and plans to close nuclear power plants in Germany. In 1999 Germany joined the rest of the North Atlantic Treaty Organization (NATO) in a military campaign against the Federal Republic of Yugoslavia (see Serbia and Montenegro) over its attacks on ethnic Albanians in Kosovo.