This pin is about Tito’s Escort Battalion.
The Tito Escort Battalion was Tito’s personal partisan escort battalion wich was founded in 1942 and responsible for his personal safety during World War II.
They were engaged in numerous battles with German troops and suffered lots of casualties. They fought in the Axis Case Black Offensive in Serbia and they hold off the German 500th. SS Parachute Battalion. So they were not to be messed with.