'Join' in the Bible

So now, command that they cut cedar trees from Lebanon for me, and my servants will join your servants, and I will give you whatever wages you set for your servants. For you know that there is no one among us who knows how to cut timber like the men of Sidon.”

King Baasha of Israel invaded Judah and interdicted Ramah by building fortifications around it so no one could enter or leave to join King Asa of Judah.

Then he asked Jehoshaphat, "Will you join me in battle against Ramoth-gilead?"

"I'm with you," Jehoshaphat answered the king of Israel. "My army will join yours, and my cavalry will be your cavalry." But Jehoshaphat also asked the king of Israel, "Please ask for a message from the LORD, first."

Then Ahaziah son of Ahab said to Jehoshaphat, "Let my sailors join yours in the fleet," but Jehoshaphat refused.