Belgrade the capital of Serbia and its largest city, it is located at the crossover between the Sava and Danube rivers and also the Pannonian Plain and the Balkan Peninsula. It has been home to some of the most important prehistoric cultures of Europe such as the Vinca culture that developed out of the Belgrade area. The Thraco-Dacians lived there during the times of antiquity, Celts settled in the city, Romans have conquered it and Slavs have settled there during the 520s. If this is already getting complicated, just note, that Belgrade is considered one of the most strategically placed cities in the world.
In total, the capital city has been destroyed in war 44 times and has been battled over during at least 115 wars. Once the Slavs had made it their home, the city changed hands several times between the following empires: Byzantine, Frankish, Bulgarian, and the Kingdom of Hungary. It was even the seat of the great Serbian King Stefan Dragutin in 1284, called great because he held onto the city for the longest period of time. All that came to an abrupt end when Beligrad was conquered and demolished by the Ottoman Empire in 1521.
During the Austro-Ottoman wars most of the city was destroyed, the power and control of the city switched so frequently between the hands of Habsburg and Ottoman that nothing was really ever rebuilt. It took until 1841 for Belgrade to finally be named the capital of Serbia again. And the destruction did not stop there, it was attacked during World War I and World War II.
Even during the breakup of Yugoslavia and during the Kosovo War, Belgrade was bombed by NATO during 1999 which destroyed numerous main infrastructure buildings such as hospitals and governmental buildings. After the Yugoslav Wars, Belgrade became home to millions of refugees and people displaced by the conflicts.
We can finally say that Belgrade is now in a period of peace without any military conflicts in Belgrade for numerous years – that being said it is still a dangerous place where you have to watch out for minefields.