Allah says: "There is no compulsion in religion", meaning: do not force anyone to embrace Islam, because it is clear and its proofs and evidences are… - Ibn Kathir

Ibn Kathir (Commenting on Quran 2:256 in the unabridged version of his tafsir) - "Therefore all people of the world should be called to Islam. If anyone of them refuses to do so, or refuses to pay the jizya, they should be fought till they are killed."

...so that they may learn about the religion of Allah, so that Allah’s call will spread among His servants….In summary, those who come from a land at war with Muslims to the area of Islam, delivering a message, for business transactions, to negotiate a peace treaty, to pay the Jizyah, to offer an end to hostilities, and so forth, and request safe passage from Muslim leaders or their deputies, should be granted safe passage, as long as they remain in Muslim areas, until they go back to their land and sanctuary.

Also (forbidden are) women already married, except those whom your right hands possess. The Ayah means, you are prohibited from marrying women who are already married, except those whom your right hands possess, except those whom you acquire through war, for you are allowed such women after making sure they are not pregnant. Imam Ahmad recorded that Abu Sa`id Al-Khudri said, "We captured some women from the area of Awtas who were already married, and we disliked having sexual relations with them because they already had husbands. So, we asked the Prophet about this matter, and this Ayah was revealed, Also (forbidden are) women already married, except those whom your right hands possess. Consequently, we had sexual relations with these women." This is the wording collected by At-Tirmidhi An-Nasa'i, Ibn Jarir and Muslim in his Sahih.