BELGRADE - When NATO launched its first air campaign on European soil in 1999 to force Serbia to halt crackdown on independence-seeking Kosovo, the European Union was far from minds of both Belgrade and Pristina.
Now, fifteen years later, the former bitter foes have made their first steps on the European path, after reaching historic accord on normalisation of relations last April under a watchful EU mediation.
Although Serbia steadfastly refuses to recognise the independence of its former, majority ethnic-Albanian province, it has normalised ties to a degree allowing it in January to open EU membership talks.
Kosovo also has agreement to enter talks on an EU stabilisation and association deal -- a lesser pact that is first step on a long path towards possible EU membership.
But the 1999 NATO bombing campaign which lasted 78 days still remains etched deep in public memory.
On March 24 of that year, the Atlantic alliance launched its air strikes -- without UN Security Council backing -- after late Serbian president Slobodan Milosevic spurned a peace deal to end his forces' repression on ethnic Albanian guerrillas fighting for the independence of Kosovo.
Crimea referendum brings back memories
The disputed referendum on March 16 this year in which Crimeans voted overwhelmingly to secede from Ukraine and join Russia has brought back memories both in Kosovo and Serbia.
After years of condemning Kosovo's secession, Moscow cited it as a precedent for its actions in Crimea.
Analyst Miodrag Radojevic of Belgrade-based Institute For Political Studies said the link could be made between 1999 NATO bombings and Crimea referendum, as "both have no legitimate legal foundations".
"But globally, the 1999 bombings were a precedent that has grown into a sort of custom, as we can see nowadays in Crimea," he said.
After the end of the bombings in June 1999, Kosovo was placed under UN administration, with NATO-led peacekeepers providing security on its territory.
In 2008, Pristina unilaterally declared independence which has so far been recognised by more than 100 countries, including the United States and most of the European Union's 28 member states.
Although Belgrade still rejects Pristina's independence, a "certain level of placability could be seen towards Kosovo's separation," said Radojevic.
Taking part in EU-mediated talks with Pristina "shows that (Belgrade) has de facto recognised the situation on the ground," he added.
But a further normalisation is possible "only if EU opens its doors to both sides, providing a clear European perspective" for the former foes, said Pristina-based political analyst Adrian Qollaku.
"If it was not for the EU and their promising carrot and threatening stick, the two sides would never even try to normalise their relation," said 19-year old student Valon Istrefi.