Alive, in triumph! And Mercutio slain! Away to heaven, respective lenity, and fire-eyed fury be my conduct now! , Staying thine to keep him company. Either thou, or I, or both, must go with him.
You wretched boy, you who associated with him here, will soon be near him again.
And for that offence, Immediately we do exile him hence.
Ha, banishment! Be merciful, say 'death,' for exile hath much terror in his look
External Conflict (Man vs. Man) Act III Scene i, Pg. 169 Lines 119-129
The conflict between Romeo and Tybalt is an external Man vs. Man conflict because it is a fight between two characters where one, Tybalt ends up dead. The conflict begins with a fight between Tybalt, a Capulet, and a family friend of Romeo's Mercutio. Romeo attempts to get in between the two which results in Tybalt going under Romeo to stab Mercutio and then proceeding to run away. He re-enters later and has a verbal conflict with Romeo which escalates to "This fight will decide that!" They fight and this time Tybalt end up being the one to fall. Romeo runs out of the scene after murdering Tybalt in an attempt to escape punishment for his crime. This shows an external Man vs. Man conflict because it is a physical fight between two characters where one ends up dead.
External Conflict (Man vs. Society) Act III Scene iii
This conflict in Romeo and Juliet portrays a Man vs. Society conflict. Romeo is being pushed out by the society he has come to love along with people in it, especially Juliet. He can no longer reside in Verona where his wife is. After Romeo had murdered Tybalt, he had been punished with an exile, which forced him out of Verona forever. His society had practically disowned him, making this a Man vs. Society conflict. Romeo is up against the society he grew up in and if he were seen in Verona, he'd be executed. His banishment puts him in an environment where he cannot do the one thing he wants to, be with Juliet. Their inability to meet is what puts Romeo against society in this conflict, being the one barrier between himself and Juliet.
They fight and Tybalt falls
"Tis torture, and not mercy. Heaven is here, where Juliet lives... every unworthy thing, live here in heaven and may look upon her; but Romeo may not...he is banished...and say'st thou yet that exile is not death?"