Mt 28:18-20, Acts 1:8
In the Old Testament, God was with the Israeli army, so the Israeli army killed the Midianites as easily as they killed a single man. (Judges 6:16)
Judges 6:16 And the Lord said unto him, Surely I will be with thee, and thou shalt smite the Midianites as one man.
God has given all authority to Jesus, the Christ, and Jesus is with us, so we will surely do world evangelization. (Matthew 28:18-20, Acts 1:8)
Matthew 28:18 And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth. 19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: 20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.
Acts 1:8 But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.