What was the avenue for spreading Islam to Eastern Europe?

Islam spread to Eastern Europe primarily through trade, military conquests, and cultural exchanges. The Ottoman Empire played a significant role, as its expansion into the Balkans brought Islam to regions like Bosnia, Albania, and Kosovo. Additionally, interactions through trade routes facilitated the exchange of ideas and religious beliefs, contributing to the gradual adoption of Islam in various communities. Over time, local conversions and the establishment of Muslim communities further entrenched the religion in Eastern European societies.