From what I read
Bundy was paying range fees till 1993

At that time Blm took over management of the land

They decided that the number of cattle on the land exceeded capacity
And. Reduced permitted number of cattle

Bundy refused the change and stopped paying range fees
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"It's not a lie if you believe it." -- George Costanza
The whole problem with the world is that fools and fanatics are always so certain of themselves. --Bertrand Russel