how were the persians related to this?
Abu Bakr decided to expand the empire. This set the stage for the Islamic conquest of Persia. Khalid was sent to the Persian Empire with an army and conquered the richest province of the Persian empire: Iraq.
Ridda wars
With the collapse of the rebellions, Abu Bakr now decided to expand the empire. It is unclear whether his intention was to mount a full-scale expansion, or preemptive attacks to secure a buffer zone between the Islamic state and the powerful Sassanid and Byzantine empires. This set the stage for the Islamic conquest of Persia.
Khalid was sent to the Persian Empire with an army consisting of 18,000 volunteers, and conquered the richest province of the Persian empire: Iraq. Thereafter, Abu Bakr sent his armies to invade Roman Syria, an important province of the Byzantine Empire.
who took over the islamic empire after the caliphs UNANSWERABLE what is this succession issue? The succession to Muhammad is the central issue that split the Muslim community into several divisions in the first century of Islamic history. Shia Islam holds that Ali ibn Abi Talib was the appointed successor to the prophet Muhammad. Sunni Islam maintains Abu Bakr to be the first leader after Muhammad. who was this leader maintained by the sunnis? A father-in-law and companion of the Islamic prophet Muhammad. He was the first of the Rashidun Caliphs. where was he from? Mecca, Saudi Arabia. how did he die? He fell sick and did not recover. He developed a high fever and was confined to bed. His illness was prolonged did he take part in any war? Yes - he participated in the Battle of Uhud, Battle of the Trench, Invasion of Banu Qurayza, Battle of Khaybar, Ridda Wars who were the parties involved in the last war? Military campaigns launched by the Caliph Abu Bakr Versus rebel Arabian tribes where was it fought? Medina, Yamamah, Oman, Northern Arabia to  name a few what was the result of this war? The rebellions collapsed, Abu Bakr now decided to expand the empire.
wiki:12775783
Ridda wars [SEP] Aftermath
With the collapse of the rebellions, Abu Bakr now decided to expand the empire. It is unclear whether his intention was to mount a full-scale expansion, or preemptive attacks to secure a buffer zone between the Islamic state and the powerful Sassanid and Byzantine empires. This set the stage for the Islamic conquest of Persia. Khalid was sent to the Persian Empire with an army consisting of 18,000 volunteers, and conquered the richest province of the Persian empire: Iraq. Thereafter, Abu Bakr sent his armies to invade Roman Syria, an important province of the Byzantine Empire.