The Battle of Tobuk

Khadir ibn al-Walid with 350 sahaba comes upon the king, uqayidir in the middle of nowhere. He is captured and he is brought in front of the Prophet,. Salaamu alayhi was Salaam - who agrees to pay the jizya. This was one of the big successes of the Battle of Tobuk. To follow that success up, three, four other such relationships were done with the northernmost tribes of the Arabs. So what in effect happened was the northern barrier was sealed against the Romans.