It might go into past tense to match the last part.
The elimination of Jason carried a largely symbolic value.
It did not end the terrorist activities of his men, who were inspired by the fanatical theology of 'The Fifth Religion', which Jason was one of the prominent masterminds of - nor did it prevent terror attacks carried out to avenge his death.
Nevertheless, the authorities succeeded, slightly, in improving their image around the state, and in raising the morale of the citizens. That is, virtually, the whole story.
The chase after Jason began in 1998, when members of "The Fifth Religion", by order of Jason, carried out terror attacks in Tunao and Pitono. David Blat, then head of the special services, tried to assassinate Jason, by having his men launch missiles at Jason's camp, but the terrorist emerged unscathed.
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