IDEF was postponed from May 2021 to 17-20 August 2021.
What they say
“The International Defence Industry Fair (IDEF), which is one of the 4 biggest defense industry fairs in the world and where Turkish defense industry products are showcased, received a passing grade in 2019 from visitors and exhibitors. At the fair held in Istanbul in May 2019, the opening was made by President Recep Tayyip Erdoğan, 151 delegations and 587 delegation members from 70 countries and 3 international organizations were hosted.” (IDEF)
IDEF website: idef.com.tr
Exhibitor list: idef-19-exhibitor-list
Organiser: TÜYAP fairs and exhibitions organization inc.