A miracle is an extraordinary event manifesting divine intervention in human affairs. Throughout Scripture, God has acted on behalf of His people, both the Jews and the Christians, by performing miracles of both a personal and global scale to manifest His power and His presence. Jesus Himself performed miracles of various sorts during His first coming when He preached the gospel to the Jews before He was put to death on the cross for all mankind's sins, only to rise from the dead three days later.
In the Left Behind series, miracles take place throughout the books, performed both by God and by Satan through his followers. In the prequel books, Israel was miraculously saved from the first Gog and Magog attack upon them by Russia, as was prophesied in the book of Ezekiel (chapters 38 and 39). During the Tribulation, believers experience all kinds of miracles such as protection from assault by the Global Community forces around Petra during the last 3 1/2 years and protection from the effects of some of the Trumpet and Bowl Judgments.
Unfortunately, also during the time, Nicolae Carpathia performed miracles such as raising Leon Fortunato from the dead after the Wrath Of The Lamb earthquake, and even gave power to Leon to call down fire from the sky to destroy whoever opposed him, which included three disloyal subpotentates and Nicolae's former lover Hattie Durham when she finally became a believer. Nicolae also gave Leon power to raise up disciples imbued with the same power to perform miracles that would sway people from believing in God. A demonic apparition called the Wonder Worker lured nonbelievers out of Petra with a showcase of miracles, including administering the "mark of loyalty" without the use of technology, only to reveal that his real purpose was to destroy them.