Ma Chao, Han Sui and others were stationed at Tongguan, and Cao Cao campaigned west and faced them across the pass. (Records of the Three Kingdoms (Sanguozhi) 魏書 武帝紀 (卷01) 建安16년)
Cao Cao crossed the Wei River and fought Ma Chao and Han Sui, beheaded Cheng Yi and Li Kan, routed them heavily, and pacified Guanzhong. (Records of the Three Kingdoms (Sanguozhi) 魏書 武帝紀 (卷01) 建安16년)
Sun Quan moved his seat to Moling, and the next year built a wall at Shitou and renamed it Jianye (the Ruxu fortifications were built). (Records of the Three Kingdoms (Sanguozhi) 吳書 吳主傳 (卷47) 建安16년)
In the third month Cao Cao sent Zhong Yao to attack Zhang Lu, and sent Xiahou Yuan and others to Hedong to join him. Gu You warned that Han Sui and Ma Chao were suspicious and would rebel, but Cao Cao did not listen. (Zizhi Tongjian (Comprehensive Mirror) 資治通鑑 卷066 (원문 단락 #5331, 211년))
In the eighth month Cao Cao reached Tongguan and camped facing Ma Chao and others across the pass. Secretly he sent Xu Huang and Zhou Ling with four thousand troops to cross at Puban and camp in Hexi. In the intercalary month, when Cao Cao left the pass and crossed north, he stayed alone with a hundred-odd guards at Nan'an to cover the rear, and Ma Chao attacked with over ten thousand horsemen, arrows falling like rain. (Zizhi Tongjian (Comprehensive Mirror) 資治通鑑 卷066 (원문 단락 #5333, 211년))
In the tenth month Cao Cao marched north from Chang'an against Yang Qiu, besieging Anding. When Yang Qiu surrendered, he restored his rank and had him comfort the people. (Zizhi Tongjian (Comprehensive Mirror) 資治通鑑 卷066 (원문 단락 #5336, 211년))
Liu Zhang ordered his people to receive Liu Bei, and when he entered the capital, his ears were the same as before; the Governor of Baijun, Yan An, sighed 'I have released a tiger to guard myself.' Liu Bei went north from Jiangzhou by the water route and met Liu Zhang's thirty-odd thousand infantry and cavalry at Fu. (Zizhi Tongjian (Comprehensive Mirror) 資治通鑑 卷066 (원문 단락 #5340, 211년))
West Asia (1)
A proposal to divide the empire: Antoninus would camp at Byzantium in Europe and Geta at Chalcedon in Asia. It fails because of their mother's opposition. (Herodian, History of the Empire 4.3)
Southern Europe (6)
Antoninus, pretending to reconcile his brother Geta, called him to their mother's rooms and had centurions kill Geta in her arms (aged 22 years 9 months) (Cassius Dio, Roman History 78(77).2.2)
Antoninus rushed to the camp and showered the soldiers with promises, then killed some 20,000 freedmen and soldiers (men and women) of Geta's party in the palace, and murdered notables such as Papinianus (Cassius Dio, Roman History 78(77).4.1)
Severus's funeral and deification take place in Rome. It is believed that an eagle rising from the burning pyre carries his soul to heaven. (Herodian, History of the Empire 4.2)
The two brothers divide the palace, suspect each other of poisoning, and even eat at separate tables. The army and officials split into two factions. (Herodian, History of the Empire 4.3)
After Geta's murder, Caracalla tells the praetorians in excuse that "my brother attacked me with armed men." (Herodian, History of the Empire 4.4)
After his father's death Caracalla complains at the praetorian camp that his brother is plotting, then kills his brother in the palace and has the body burned at once (Historia Augusta Carac. 2.4)
Western Europe (6)
Severus dies of illness at Eboracum in Britain (reign of 18 years). (Aurelius Victor, De Caesaribus Aur. Vict. Caes. 20.27)
When the Britons revolted again and Caledonia joined the Maeatae, Severus was preparing to fight in person but fell ill and died on 4 February; some say Antoninus helped bring it about (Cassius Dio, Roman History 77(76).15.2)
Antoninus made peace with the enemy, evacuated the territory and abandoned the forts; he dismissed Papinianus and killed Euodus, Castor, Plautilla and others (Cassius Dio, Roman History 78(77).1.1)
Severus dies in old age at Eboracum (York), leaving two sons, Bassianus and Geta; Geta was declared a public enemy and soon died. (Eutropius, Breviarium Eutr. 8.19)
The ailing Severus hands command of the army to his son and dies, leaving his two sons wealth and a mighty army. (Herodian, History of the Empire 3.15)
In the 18th year of his reign, old and gravely ill, Severus dies at Eboracum in Britain (Historia Augusta Sev. 19.1)