The Global Community One World Unity Army consists of all Peacekeepers from all the governing districts of the Global Community who have been ordered and deployed by the order of Nicolae Carpathia for battle training to the Valley of Megiddo in Israel. This deployment began one year before the end of the Tribulation in "Armageddon" and eventually culminated into a massive fighting force by the end of that year. Divisions were stationed in various locations such as Jerusalem, Petra, Bozrah, and the Valley of Megiddo.
Before this deployment, Unity Army groups were used to mitigate the effects of the Bowl Judgments, using nuclear submarines to act as generators after earthquakes, delivering medicine after plagues, and employing area denial systems to keep the Locusts at bay whenever possible.
The Jerusalem contingent was to storm the city and overtake the Jews fighting there, while the Petra contingent was to storm the place of refuge for the Israelis, Jews, and believers hiding out there. Ultimately, with Nicolae Carpathia leading the Petra contingent, they were also aiming to destroy God and His Son Jesus Christ when He emerges with His heavenly army at the due time appointed to Him.
Unfortunately for the Unity Army, their goal was never realized as Jesus, with His powerful weapon, the "sword of His mouth", destroyed all the soldiers of that contingent, leaving no survivors except for Nicolae and Leon Fortunato. The Bozrah and Valley of Megiddo contingents were also destroyed in a similar fashion, while the flesh-dissolving plague and the earthquake that split the Mount of Olives into a valley consumed the entire Jerusalem contingent. By the time all was said and done, the entire Unity Army was destroyed.
Despite having access to the entire world's remaining arsenal, the Unity Army is seldom shown to use modern strategic weapons, although they do deploy a cruise missile in their failed attempt to cut off Petra's water source. Notably, due to Nicolae Carpathia's micromanagement, they fail to deploy any anti-air weapons against Jesus.