To what extent was Leadership the most significant factor in the rise and rule of the Ottomans?

First understand how and why the Ottomans were able to create such a large empire, and then examine the reasons for successfully maintaining their empire. 

Look briefly at the situation in Anatolia and South-Eastern Europe in the 13th and 14th centuries. Then discuss the actions and policies of the Ottomans.

Answer is well explained below

Step-by-step explanation

Leadership was such an essential factor in the rise and rule of the ottoman. For instance, the Ottoman Empire was organized into a stable organization with steadfast leadership. Notably, the Ottomans were very contained in every aspect of life. These included their judicial system, trading links, political systems, and military systems. The excellent leadership in every part of their life gave them an upper hand in their rise. 
The Ottomans were able to create a large empire through the practice of assimilation. For instance, the Ottomans preferred to assimilate than to destroy regional kingdoms. They were wise to realize that dead enemies would not pay those taxes, and so to be prudent enough; they adopted the assimilation method to expand their territory. People preferred to pay taxes in exchange for being killed.  Through assimilation, the Ottomans were able to gain and consolidate power and thus expanding the empire. The Ottomans maintained the large empire by creating a good base ranging from government, education, and militia. Also, the Ottomans had a strong army with the best technology. 
The Ottomans had a religious policy. For instance, under Ottoman rule, those not Muslims were given the freedom to practice their religion without interference. They enjoyed a measure of communal autonomy. Furthermore, the Ottoman rule guaranteed their safety and security of their property.