In its first use of economic sanctions against combatants in the bloody fighting in South Sudan , the Obama administration on Tuesday ordered asset freezes and travel bans on two individuals, one on each side of the conflict. The sanctions, which were announced by Secretary of State John Kerry , were imposed under an executive order President Obama signed a month ago in response to the violence that has killed thousands and displaced more than a million people. The announcement came as President Salva Kiir of South Sudan and Riek Machar, the rebel leader, agreed to face-to-face talks in Ethiopia, which are tentatively scheduled to be held on Friday. One of the targets of the sanctions was Marial Chanuong, the commander of the government’s presidential guard force, who Mr. Kerry said led attacks against civilians in and around Juba, the South Sudan capital. The other was Peter […]