It is hinted that the beheaded soldiers and suicide victim, were, in fact, in the presence of the 'Governor' (David Morrissey) at some point.
Pete mentions Fort Benning, a place where Rick's group planned to head at the start of the second season.
The tank shown next to the Governor's trailer in the opening scene appears to be the US M60A1 medium battle tank, first designed in the late 1950s and in service between 1962 and 1980.
Kirk Acevedo, Audrey Marie Anderson and Juliana Harkavy later appear on the sixth and seventh seasons of Arrow (2012).