I want to know the answer to the following question:
Which year's election was perceived to be fraudulent?
All the background I'm provided with is that "But soon after the election, President Juárez had another crisis on his hands; the Juárez administration was suspected to be involved in the assassination of the military chief José María Patoni executed by General Canto in August 1868.". Is that enough to answer the question?
Answer: no