Presently Britain had never been gone by the Romans and was totally obscure to them before the season of Caius Julius Caesar, who, in the year 693 after the establishment of Rome, yet the sixtieth year before the Incarnation of our Lord, was diplomat with Lucius Bibulus. While he was making war upon the Germans and the Gauls, who were separated just by the stream Rhine, he came into the region of the Morini, whence is the closest and most limited section into Britain. Here, having given around eighty boats of weight and quick cruising vessels, he cruised over into Britain; where, being first generally dealt with in a fight, and after that got in a tempest, he lost an impressive piece of his armada, no modest number of infantrymen, and all his mounted force. Returning into Gaul, he put his armies into winter-quarters and gave orders for building six hundred sail of the two sorts.
The apparitions that the witches summoned were all perceived to be helpful to Macbeth when in reality they would become his downfall. Just as he believed the witches wanted to be helpful and courteous when in reality they had tricks up their sleeves. Hope this helps!
-J
