How does the Sentinel feat work with the Extra Attack feature?
Following this answer about Actions/Reactions etc, it says:
Reactions are actions that you take out of turn (or possibly on your turn) that happen in response to something else.
Can I follow my "Sentinel Attack" with an Extra Attack?
Extra Attack [PHB p. 72]
Beginning at 5th level, you can attack twice, instead of once, whenever you take the Attack action on your turn. The number of attacks increases to three when you reach 11th level in this class and to four when you reach 20th level in this class.
Sentinel[PHB p. 169]
You have mastered techniques to take advantage of every drop in any enemy’s guard, gaining the following benefits: [...]
- When a creature within 5 feet of you makes an attack against a target other than you (and that target doesn’t have this feat), you can use your reaction to make a melee weapon attack against the attacking creature.