sentences:  On 16 June 1997 the President of the Russian Federation signed the decree "About prime measures on reforming Armed forces of the Russian Federation and perfection of their structure".According to that decree, on the basis of the 4th Air Army and the 12th Independent Air Defence Corps of the Russian Air Defence Forces the 4th Army of the Air Forces and Air Defence was formed on 1 June 1998.The 10th Bombardment Aviation Division, headquartered at Yeysk with up to 90 Su-24s in three regiments (296th BAP at Marinovka, 559th BAP and 959th BAP) was part of the army during the 1990s.