Armageddon is often used to mean simply an "apocalyptic-scale disaster"; for example, news sites refer to "financial Armageddon", "environmental Armageddon", "Toyota Armageddon", etc., where there is no indication of warring parties.
Mid-Atlantic residents in the U.S. were buried by a likely record-setting blizzard which President Obama jokingly labeled Snowmageddon as well as those who were brave enough to try to clear a path through the wet, heavy mounds, of thigh-high snow.
The Farmers’ Almanac predicted an Armageddon of rain and winds during the summer and a repeat of the snowmageddon which we experienced two winters ago.
Megiddo, situated at the north end of the major pass through the Mount Carmel range, was the site of many ancient battles.
The archaeological data reinforce the literary portrait in showing frequent extremely heavy defense facilities at the site; therefore, it may have appeared to be an excellent symbol to the apocalyptic writer for the ultimate conflict he saw as the culmination (climax) of history.