Both Tacitus - a well-respected historian - and Josephus, attested to the reality of the Crucifixion. There are other references. Some people post in the most abject ignorance!
No they didn't.
Neither was contemporaneous with the events, let alone an eye witness. Josephus was born perhaps a couple of years after Jesus' death while Tacitus was born 20 years later again.
Tacitus, writing in around 116 briefly mentions christians, mostly referring to the ongoing persecution of them at the time, with particular reference to their supposed role in the great fire in Rome. The only mention to Jesus himself is a very brief allusion to his death with no detail whatsoever:
'Christus, from whom the name had its origin, suffered the extreme penalty during the reign of Tiberius at the hands of one of our procurators, Pontius Pilatus'
That's it.
Josephus was writing in about 90 and some of the sections attributed to him are largely accepted to be later additions by scholars. But even if we accept it as authentic all it says about his death is:
'He won over many Jews and many of the Greeks. He was the Christ. And when, upon the accusation of the principal men among us, Pilate had condemned him to a cross, those who had first come to love him did not cease.'
So indeed there is a mention of a cross, but that's it. And that's even if this passage is accepted as genuine, which may scholars doubt. And really he is referring to what the early christians believed rather than providing a historically accurate description.