Mohammad Nadir Shah vs Sultan Qaboos

Mohammad Nadir Shah seized the throne after the fall of Habibullah Kalakani. He led forces from the Eastern Province to capture Kabul, ending the nine-month rule of the bandit king and restoring the Musahiban branch of the Barakzai dynasty to power.

Nadir Shah's forces crushed a rebellion in the Khost province led by loyalists of the deposed Amanullah Khan. The rebellion was defeated after several months of fighting, consolidating Nadir Shah's control over the country and eliminating a major challenge to his rule.

Nadir Shah introduced a new constitution for Afghanistan, establishing a constitutional monarchy with a parliament. The constitution granted limited civil liberties and established a bicameral legislature, though real power remained with the king. It replaced the 1923 constitution of Amanullah Khan.

Mohammad Nadir Shah was shot and killed by Abdul Khaliq Hazara, a student at a Kabul school, during a prize distribution ceremony. The assassination was motivated by personal grievances and political tensions, leading to the accession of his son Mohammad Zahir Shah.

Qaboos bin Said overthrew his father, Sultan Said bin Taimur, in a palace coup. He assumed power and immediately began modernizing Oman, ending decades of isolation and initiating a rapid transformation of the country's infrastructure, education, and healthcare.

Qaboos led the Omani military, with support from British, Iranian, and Jordanian forces, to defeat the Marxist Dhofar Rebellion. The victory consolidated his rule and secured Oman's borders, allowing him to focus on development.

Qaboos promulgated Oman's first written constitution, the Basic Statute, which defined the powers of the sultan, established a bicameral advisory council, and guaranteed basic rights. It was a step toward limited political participation without full democracy.

Qaboos facilitated secret talks between the United States and Iran that led to the framework for the Joint Comprehensive Plan of Action (JCPOA). His mediation showcased Oman's role as a neutral diplomatic broker in the Middle East.