Nearly 600 Turkish soldiers entered Syria on Saturday night to evacuate dozens of its own troops who have been stuck guarding an ancient tomb near Kobani. For months, Turkey has stationed a rotating cast of 40 soldiers outside a 13th century Ottoman tomb that belonged to the grandfather of Osman I, who founded the Ottoman Empire. The troops moved the crypt closer to the Turkish border and ceremonially planted their flag. One soldier was killed in what the government called an accident. The Syrian government decried the mission as a "flagrant aggression" and accused Turkey of coordinating with ISIS.