Castra Vetera (modern Birten near Xanten): Roman legionary base on the Lower Rhine. See http://www.livius.org/x/xanten/vetera.html
Vetera changed hands several times duing the Batavian revolt in 69, and the Roman garrison surrendered and was massacred by the Rebels in 69.
For a detailed account of the rebellion and the actions at Vetera, please see Henderson Civil War and Rebellion in the Roman Empire A. D. 69-70
http://www.preteristarchive.com/Books/pdf/1908_william_rebellion_in_rome.pdf