The United States employed several tools to isolate and punish "rogue states". Tough unilateral economic sanctions, often at congressional behest, were imposed on or tightened against Iran, Libya, Cuba, Sudan, and Afghanistan. After the conclusion of the Gulf War in 1991, the United States selectively used airpower against Iraq for years during the Iraqi no-fly zones to force them in complying with various United Nations Security Council resolutions regarding disarmament (i.e., Resolution 687) and human rights (i.e., Resolution 688). Cruise missiles were fired at Afghanistan and Sudan in retaliation for terrorist attacks against U.S. embassies in Kenya and Tanzania in August 1998. In March 1999, NATO launched a massive air-bombing campaign against Yugoslavia in response to the Yugoslav Army's crackdown on ethnic Albanian separatists in the province of Kosovo.