escort

1a (1) :  a person or group of persons accompanying another to give protection or as a courtesy (2) :  a man who goes with a woman to a social event (3) :  a woman or a man who is hired to go with someone to a social event —often used before another noun an escort service/agencyb :  a protective screen of warships or fighter planes or a single ship or plane used to fend off enemy attack from one or more vulnerable craft

2 :  accompaniment by a person or an armed protector (such as a ship)