Argentine War of Independence Chile, allied with the Mapuches. On April 4, Argentine Colonel Juan Gregorio de Las Heras had occupied Concepción, but the Royalists retreated to Talcahuano. In early 1818, Royalist reinforcements from the Viceroyalty of Peru arrived, commanded by general Mariano Osorio, and advanced towards the capital. San Martín then turned to scorched earth tactics and ordered the evacuation of Concepción, which he thought was impossible to defend. On 18 February 1818, the first anniversary of the battle of Chacabuco, Chile declared its independence from the Spanish Crown. On March 18, 1818, Osorio led a surprise attack on the joint Argentine-Chilean army,
Army of the Han dynasty led a force to Wusun and resolved a dispute. In 6 AD, a petty king in the area of the former Jushi Kingdom defected to the Xiongnu, who turned him over to the Han. In 7 AD, the Han convinced the Wuhuan to stop sending tribute to the Xiongnu, who immediately attacked and defeated the Wuhuan. In 9 AD, Wang Mang proclaimed himself emperor of the Xin dynasty. In 10 AD, some officers of the Protector General Dan Qin rebelled, slew him, and fled to the Xiongnu. In 16 AD, an army under Li Chong and Guo Qin was sent