What regions were conquered by the Rashidun Caliphs?

The conquests during the era of the Rightly Guided Caliphs were very numerous, encompassing the Levant, Iraq, Egypt, the Maghreb, Ifriqiya, and many lands in Asia. Details of these can be found in authoritative history books such as: Al-Bidayah wa al-Nihayah by Ibn Kathir, Al-Kamil fi al-Tarikh by Ibn al-Athir, and Tarikh al-Khulafa al-Rashidin by Al-Suyuti.