Surah 48. Al-Fath, Ayah 4

I.e., endowed them, although they were few and practically unarmed, with calm courage in the face of the much more powerful forces of the enemy.

Lit., "so that they might add faith to their faith, seeing that God's are . .", etc. Since the latter is obviously a parenthetic clause, I have transposed it in my rendering in order to make the meaning clear.

It is a casuistical question to ask. Are there degrees in Faith? The plain meaning is that believers will see one Sign of Allah after another, and with each their Faith is confirmed. During all the long years of persecution and conflict they had Faith, but when they see their old enemies actually coming out to negotiate with them, their Faith is justified, fulfilled, and confirmed: and they turn in gratitude to Allah.

The results were achieved by tranquillity, calmness, and cool courage among the 1400 to 1500 unarmed men who accompanied the Prophet to Hudaibiya and who were threatened with violence by the excited Quraish leaders of Makkah.

There are visible forces which you see in the physical world. Men fight with armed forces, and the Muslims had to defend themselves with arms also, and not without success.