Firuz Tughlaq was the king who gave up the earlier policy of maintaining a standing army and organized his army on a feudal basis, reviving the system of Jagirs. Let's understand the reasons behind this decision and the impact it had on the empire.

Reasons for the change in policy:
1. Financial constraints: The Tughlaq dynasty was facing financial difficulties due to expensive military campaigns and the maintenance of a large standing army. The treasury was depleting, and the king needed to find a more sustainable solution.

2. Feudal system revival: The concept of Jagirs, where land was granted to nobles in exchange for military service, was a prevalent feudal practice in medieval India. Firuz Tughlaq saw this system as a way to ease the financial burden on the empire while ensuring the loyalty of the nobles.

3. Administrative challenges: The Tughlaq dynasty faced numerous administrative challenges, including rebellions, revolts, and administrative inefficiencies. Firuz Tughlaq believed that organizing the army on a feudal basis would improve the administration by decentralizing power and involving the nobles in local governance.

Impact of the new policy:
1. Financial stability: By reviving the Jagir system, Firuz Tughlaq was able to reduce the financial burden on the empire. The nobles were responsible for maintaining their own troops and contributing to the defense of the kingdom, freeing up resources for other areas of governance.

2. Loyalty of the nobles: Granting Jagirs to the nobles ensured their loyalty to the king. They had a vested interest in protecting their land and maintaining their privileged status. This helped in maintaining stability within the empire.

3. Administrative decentralization: Organizing the army on a feudal basis led to administrative decentralization. The nobles became responsible for the governance of their respective regions, ensuring better local administration and quick response to local issues.

4. Weakening of the central authority: While the new system had its benefits, it also led to the weakening of the central authority. The power of the nobles increased, and they often acted independently, which sometimes led to conflicts and challenges to the king's authority.

In conclusion, Firuz Tughlaq's decision to give up the policy of maintaining a standing army and revive the Jagir system had both positive and negative impacts on the empire. While it provided financial stability, ensured the loyalty of the nobles, and improved local administration, it also weakened the central authority and resulted in greater power for the nobles.