You will most likely have to search for them yourself.
In most places ground units use:
30 - 88 MHz 25 kHz steps FM
138 - 150.8 MHz 12.5 kHz steps NFM or P25
380 - 400 MHz 12.5 kHz steps NFM or P25
In addition to the above, Army National Guard and Air National Guard aircraft can use:
118-150.8 MHz 25 kHz steps AM
220 - 400 MHz 25 kHz steps AM
Some frequencies that have been reported in the past in various places are:
32.5
34.15
36.0
36.1
36.5
36.7
36.8
38.4
38.5
38.8
40.1
41.0
41.6
41.65
41.7
41.8
41.85
41.9
46.6
46.8
46.9
49.65
49.8
49.95
241.0
242.4
Most states that have statewide trunked systems usually have talkgroups assigned for National Guard use.
For a particular event they may be issued cache radios on state or local government frequencies or national and state interop frequencies.
They probably also have HF and satcom capability.