A quick introduction to some of the events that have helped shape the identity of Yorkshire and the Humber:
BC
8,500: first known to be inhabited
AD
71-410: Roman Empire
500-850: Kingdom of Northumbria
954: Kingdom of England
1069: Harrying of the North
1290-1832: parliamentary constituency
1455-1487: War of the Roses
1642-51: English Civil Wars
1832: Yorkshire parliamentary constituency divided into three
1994: Government Office for Yorkshire and the Humber created
Wikipedia has a useful History of Yorkshire page.