
The case was reopened in 1899 -- a good 5 years later -- and was reconvincted and ordered to spend 10 years more in prison. He was subsequently pardoned, but it was not until 1906 that he was exonerated. It took 12 years for the French government to "admit" fault. He then was recommissioned in the French army and served in World War I (though I often ask myself WHY he would return to such a situation after everything that'd happened).
A rift appeared in French society between those who supported Dreyfus and those who didn't. Comics appeared in papers and the issue was covered across the country and the world. The connection of Dreyfus to Zionism is that Theodor Herzl, a journalist, was assigned to write about the case and its aftermath. In 1896, Herzl wrote The State of the Jews and founded the World Zionist Organization. Both which called for the creation of a Jewish state. There's a split among historians about whether Herzl was isnpired to fervently take on the creation of a Jewish state because of the Dreyfus affair or because of the rise of an antiSemitic mayor in Vienna, Herzl's home city. The chronology of events doesn't agree with some philosophies, as the "scandal" of the Dreyfus affair seems to have come after the pro-Dreyfus camp appeared.
I think it's safe to say, though, that both events probably worked their way into the composition of the book and subsequent efforts for a Jewish state. I think it's ignorant to assume that the Dreyfus affair had no affect on Herzl's views of the Jewish condition in Europe. Then again, I've got a bucketload of thoughts about Herzl and Zionism ...