That’s a wrap. Kofia Annan has resigned as the U.N. and Arab League envoy to Syria, Secretary-General Ban Ki-moon said Thursday. The news comes after several condemnations and peace plans that have done little to stop the violence rocking the nation. On Thursday Syria rebels marked the first time they’ve used heavy governmental weapons to on Bashar al-Assad’s regime, attacking a military airbase in Aleppo. The Syrian army, meanwhile, has been amassing troops in Aleppo, raising concerns of an all-out civil war.