The fortress in Brest, Belarus was awarded the title Hero Fortress in 1965. It was located right on the recently established border between the Soviet Union and Nazi Germany drawn in the secret appendix to the Molotov–Ribbentrop Pact. As such, the fortress had little warning when the Axis invaded on 22 June 1941, and became the site of the first major fighting between Soviet frontier guards and the invading German forces of Army Group Centre.