The term frenzy comes from the Latin phrenēsis ("delirium"), whose origin goes back to a late Greek word. The concept makes it possible to refer to agitation or commotion of the mood, to a state of excitement or exacerbation, or to a certain type of delirium.
Frenzy is associated with an impulse that cannot be contained or interrupted. Its meaning, however, varies according to the context. For psychiatry, frenzy is linked to a mental state of confusion generated by an agitation.
During the war some of the best soldiers were under the pressure of battle for a long period of time. This often resulted in a distortion of reality. Some performed better because of the frenzy in which they ended up.
Simo Häyää fought for 105 days as a sniper.
Häyhä used the standard M28 Pystykorva rifle, a Finnish variant of the Soviet Mosin-Nagant rifle, and preferred not to use a telescopic sight so as not to increase the size of the target he offered the enemy during combat, and because snipers were often spotted by the reflection of the sun on the lenses of these sights.
He managed to kill more than 505 enemy soldiers. The daily count of enemy dead was carried out on the battlefield by the Finnish snipers themselves.