Mehmed I restored the Turkish Unity and renewed the stable foundations of the Ottoman Empire. Afterwards, he declared himself as the sultan of
the Ottoman State.
Unfortunately, during the Interragnum most of the territories in Anatolia
were lost. Mehmed immediately began to make plans to take back those territories.
In 1414, he invaded Izmir from Aydinoglu Cuneyd. The
states of Saruhan and Menteseoglu were annexed in to Ottoman territories. A
campaign was arranged against the Karamanogullari who attacked Bursa. Karamanoglu Mehmed demanded
forgiveness of the sultan, and Mehmed forgave him and gave permission to live in his own
land. The State of Candarogullari, which was established during the Interregnum