 Armed forces of several countries, including the United States, the United Kingdom, India and France, have expressed interest in modafinil as an alternative to amphetamine—the drug traditionally employed in combat situations or lengthy missions where troops face sleep deprivation.The French government indicated that the Foreign Legion used modafinil during certain covert operations.The United Kingdom's Ministry of Defence commissioned research into modafinil from QinetiQ and spent £300,000 on one investigation.