Chalabi Mehmet ruled after 1413 as the only sultan. He stayed at the Edirne Palace, which had been built by Musa Chalabi before, with large walls around it. He accepted the foreign embassies who came here to celebrate himself and made appointments to the upper echelons of the state according to his own opinion. Sheikh Bedrettin was expelled from the Shaykh al-Islam and was driven to Iznik by his family and replaced by a person chosen by his brother. Mehmet Bey Mihal Son, was sent to exile to Anatolia. The territories near Thessaloniki and Constantinople, taken from Byzantine by Musa Chalabi, were returned to Byzantium again. Then came the Anatolian campaign. First of all, the state, which had survived the fire and the besieging, came to Bursa. Then he walked to the Aegean coast. Cüneyt Bey Izmir Son, took Ayasoluk Castle. At the end of the talks he made with the Senjan knights of İzmir Castle there he added to the Ottoman state. He allowed the Senjan knights to build a new castle in Bodrum. Most of the Mentese principality lands were added again to the Ottoman State. In 1414 and 1415 he headed to the Lake District. The ancient Hamit Son's, who had passed Karaman Son's hands, added the cities and lands of the Ottoman Empire.
In 1413, Mehmet Bey, who was his cousin who had walked to Bursa two years ago, fought in the Konya Plain with Karaman Son's army and besieged Konya. His son was taken captive with Mustafa Chalabi. Nevertheless, they forgave their lives. Karaman Son Mehmet Bey, signed a peace with. Along with this peace, Karaman Son gave Eskisehir, Kırsehir, Beysehir, Sivrihisar and Niğde and gave them hilat and sanctuary. When returning from Karaman's time Chalabi Mehmet was disturbed in Ankara. Germiyan Son Yakup's physician, by Mevlana Sinan was treated. Rewarded the doctor. Mehmet Chalabi returned from here to Edirne. In 1416 he came to the Rumelian. The nobles in Albania removed Ottoman troops from their territories during Fetret's time. Sultan Mehmet strengthened the situation of the Ottomans there by passing the Avlonya and the sea in the shore and passing the Akcahisar monuments. He sent riders to Mora. Went on Prince Mirce, who had supported Musa Chalabi. He built a very fortified fortress in the city of Giurgiu, which crossed the Danube river and controlled the roads of Central Hungary. At the end of this time, Wallachian Prince Mirce accepted Wallach as a dependent state of the Ottomans, just as it was during the time of Bayezit Lightning. He ensured that Dobruca was completely under Ottoman rule. He sent raids to Transylvania and Hungary to intimidate the Hungarian King, who had been spotted by the country. Every year, he sent raids to Bosnia, so the landowners there became influenced by the Ottomans, and eventually the Bosnian king II.Tvrtko officially accepted the Ottoman state as a dependent state. From here he passed Anatolia again and walked over to Samsun. Kastamonu, Safranbolu and Samsun again under Ottoman rule. The Tatars and Turkmens who lived here, they placed to a region of Tatar bazaar near Plovdiv in Rumelia.