Conversation so far:
What is the campaigns of no-reelection?
He challenged the civilian president Benito Juarez, who was running for what Diaz considered an illegal subsequent term as president.
What happened after he challanged him?
Diaz launched the Plan de la Noria on 8 November 1871, supported by a number of rebellions across the nation.
What was the Plan de la Noria?
the principle of no-reelection.
What happened after he launched it?
but this rebellion failed.
How did he come back from that?
Following the death of Juarez of natural causes in 1872, Lerdo became president.
Lerdo offered amnesty to rebels, which Diaz accepted.
Are there any other interesting aspects about this article?
When Lerdo declared he was running for re-election in 1876, Diaz once again had the pretext of the principle of no-reelection to support his opposition.

Question: How did that help him?
Self-contained rewrite: How did the principle of no re-election help Diaz in 1876?