The Department of Defense constructs numerous VHF jammers to combat the Class-E Anomalous Entity (feb 16, 1978 – aug 5, 1982)
Description:
"From the 16th of February, 1978 to the writing of this document, several VHF Jammers have been activated, spanning the borders of the US. However it is not certain if this measure is effective in trapping or blocking any signal sent of the frequency of said Class-E Anomalous Entity."-Department of Defense
Added to timeline:
Date:
feb 16, 1978
aug 5, 1982
~ 4 years and 5 months