Groomsman

In a military officer's wedding, the roles of groomsmen are replaced by swordsmen of the sword honor guard.

Their role includes forming the traditional saber arch for the married couple and guests to walk through.

Additionally, the groom may request other kinds of assistance, such as planning celebratory events such as a bachelor party, also called a stag do or buck's night; helping make the wedding pleasant for guests by talking with people who are alone or dancing with unaccompanied guests or bridesmaids, if there is dancing at a wedding reception; or providing practical assistance with gifts, luggage, or unexpected complications.

This means that the four people present at the altar are the officiant (such as a civil celebrant, priest, rabbi, minister, or other religious figure), the bride, groom, and best man.

In the past, the bachelor party was typically scheduled for a convenient evening during the week before the wedding.

Common slang names for this event are bachelor party, stag do, or bucks' night in different parts of the world.