هل هناك حديث صحيح يشير إلى أن دولة رومية ستُسلم وتدافع عن المسلمين في المستقبل؟

It has been reported in multiple hadiths that the cities of Rome (Rumiyah) and Constantinople (Al-Qustantiniyah) will be conquered and embraced Islam at the End of Times. No hadith (definition) mentions that Rome will defend Muslims when infidels attack, but it is natural that it would do so if it converts to Islam.

Among what has been reported concerning the conquest of Rome is what Al-Hakim narrated from Abdullah ibn Amr that the Prophet (peace and blessings be upon him) said: "No, rather the city of Heraclius first," meaning Constantinople.

Among what has been reported concerning the conquest of Constantinople is what Imam Ahmad narrated that the Messenger of Allah (peace and blessings be upon him) said: "Constantinople will certainly be conquered, and how excellent is its Amir and how excellent is that army." The first conquest was achieved by the Ottoman conqueror.

Rome is located to the north and west of Constantinople and is currently in the hands of the Franks, referring to the city of Rome, the capital of Italy.