Danny teaches us the word "Apostle" = One Sent. and Ambassador is an Authorized Representative. We also learn Jesus hands His ministry off! First to a limited Commission (12 Apostles - Luke 9:1-9), next to an expanded Commission (72 others - Luke 10:1-21), and last the Great Commission preached in his name to all nations (Christians - Luke 24:47). 

But beware of -- enemy territory and opposition; so go with God, together (2 by 2), with simplicity, rejection, victories and person of Peace.