I believe that warfare and conflict between extraterrestrial races go back in earth’s history for tens of thousands of years as recorded in the Ramayana, Mahabharata and other Hindu texts and in the Bible. The Hindu texts speak in great detail of highly technical extraterrestrial civilizations during the time of the Rama Empire and of an incredibly destructive war some ten or twelve thousand years ago between Atlantis and Rama that could not be imagined until the second half of the 20th century.
In this link http://www.crystalinks.com/vimanas.html there is some very interesting information. The author states: “The Mahabharata is a veritable gold mine of information relating to conflicts between gods who are said to have settled their differences apparently using weapons as lethal as those we have now. Apart from 'blazing missiles', the poem records the use of other deadly weapons. 'Indra's Dart' (Indravajra) operated via a circular 'reflector'. When switched on, it produced a 'shaft of light' which, when focused on any target, immediately 'consumed it with its power'.”To read more, click here.