Fight together (3)
"Joab saw that the enemy troops would attack him in front and from the rear, so he chose the best of Israel's soldiers and put them in position facing the Syrians. He placed the rest of his troops under the command of his brother Abishai, who put them in position facing the Ammonites.
Joab said to him, “If you see that the Syrians are defeating me, come and help me, and if the Ammonites are defeating you, I will go and help you. Be strong and courageous! Let's fight hard for our people and for the cities of our God. And may the LORD's will be done!”"
~ 2 Samuel 10.9-12 GNB
Joab and Abishai split responsibilities and matched their troops against the enemies strength-to-strength. And at the same time, they are fully committed to help each other.
They planned strategically, fought together, and back each other up.
All Christ' people ought to serve him like that. "And may the LORD's will be done."