Universal history preceded by the Bronze Age. Its date and context vary depending on the country or geographical region. During the 13th to 12th centuries BC, the Ramesside Period occurred in Egypt. Around c. 1200 BC, the Trojan War was thought to have taken place. By c. 1180 BC, the disintegration of the Hittite Empire was underway. In 1046 BC, the Zhou force, led by King Wu of Zhou, overthrows the last king of the Shang Dynasty. The Zhou Dynasty is established in China shortly thereafter. In 1000 BC, the Mannaeans Kingdom begins in Western Asia. Around the 10th to 7th centuries
Seleucid Empire the European portions of Alexander's empire. Antiochus I (reigned 281–261 BC) and his son and successor Antiochus II Theos (reigned 261–246 BC) were faced with challenges in the west, including repeated wars with Ptolemy II and a Celtic invasion of Asia Minor—distracting attention from holding the eastern portions of the Empire together. Towards the end of Antiochus II's reign, various provinces simultaneously asserted their independence, such as Bactria and Sogdiana under Diodotus, Cappadocia under Ariarathes III, and Parthia under Andragoras. A few years later, the latter was defeated and killed by the invading Parni of Arsaces - the region would