Difference between Attacker and Aggressor

Attacker

Part of speech: noun

Definition: Someone who attacks Players on a team in football (soccer) in the row nearest to the opposing team's goal, who are therefore principally responsible for scoring goals.

Aggressor

Part of speech: noun

Definition: The person who first attacks or makes an aggression; he who begins hostility or a quarrel; an assailant.

Example sentence: The Iranian regime has been terrorizing the Middle East for 40 years. They've been the aggressor for 40 years. And finally this president, President Donald J. Trump, said 'enough is enough.'