Erdağı became so the highest-ranked military officer in Turkey to be prisoned. He was forced to retire by the Supreme Military Council's annual meeting in August 2007. In the Balyoz trial (literally: Sledgehammer trial) that began in 2010, retired General Ergin Saygun was arrested and indicted for his involvement in an alleged military coup plan to overthrow the Justice and Development Party government along with some other 365 military members, which reportedly dates back to 2003. At that time, he was the commander of the 3rd Corps. The court accused him for putting 3rd Corps headquarters as the center of the coup plan. General Saygun denied the accusations of the court with the defense that at that time he had taken orders to make arrangements for the conversion of the unit into a high readiness force headquarters assigned to NATO only. Therefore, they had no time for any plot preparations. Nevertheless, he was convicted and sentenced to 18 years in prison. However, he was released following a heart surgery due to his critical health condition. See also  III Corps (Ottoman Empire), history of the unit during the Ottoman era.
Erdağı became so the highest-ranked military officer in Turkey to be prisoned. He was forced to retire by the Supreme Military Council's annual meeting in August 2007. In the Balyoz trial (literally: Sledgehammer trial) that began in 2010, retired General Erin Saygun was arrested and indicted for her involvement in an alleged military coup plan to overthrow the Justice and Development Party government along with some other 365 military members, which reportedly dates back to 2003. At that time, she was the commander of the 3rd Corps. The court accused her for putting 3rd Corps headquarters as the center of the coup plan. General Saygun denied the accusations of the court with the defense that at that time she had taken orders to make arrangements for the conversion of the unit into a high readiness force headquarters assigned to NATO only. Therefore, they had no time for any plot preparations. Nevertheless, she was convicted and sentenced to 18 years in prison. However, she was released following a heart surgery due to his critical health condition. See also
 III Corps (Ottoman Empire), history of the unit during the Ottoman era.