Another 97 that won't crank

[Jeff48]

Yet another 97 with cranking problems

My 97 XD is relatively stock. Here's what just happened yesterday without warning. I am at a complete loss.

Battery @ 12.57 VDC
Turn the key.... clicking only

All fuses have been checked
No Brake lights or Turn Signals in any key position
Transmission shifter locked in Park in all key positions
Transfer case shifter locked in high normal in all key positions.
The fan for Heating AC does not work in any key position
All lights except for Brakes and turn signal work
Radio works
Key locks all door actuators and sets anti theft device
Theft protection light flashes fast (1 or more times per second) unless doors are locked from outside
If doors are locked from the outside, antitheft light is slower but still about 1 every 2 or three seconds.

Any assistance would be appreciated.