Adrianople was a vital fortress defending Ottoman Constantinople and Eastern Thrace during the Balkan Wars of 1912–13. It was briefly occupied by the Bulgarians in 1913, following the Siege of Adrianople. The Great Powers–Britain, Italy, France, and Russia–attempted to coerce the Ottoman Empire into ceding Adrianople to Bulgaria during the temporary winter truce of the First Balkan War. The belief that that government was willing to give up the city created a political scandal in the Ottoman government in Constantinople (as Adrianople was a former capital of the Empire), leading to the 1913 Ottoman coup d'état. Although it was victorious in the coup, the Committee of Union and Progress under Enver Pasha was unable to stop the Bulgarians from capturing the city after the fighting resumed in the Spring. Despite relentless pressure from the Great powers(Russia, Britain,France) the Ottoman empire never officially ceded the city to Bulgaria. Edirne was swiftly reconquered by the Ottoman empire during the Second Balkan War under the leadership of Enver Pasha (who would proclaim himself the "second conqueror of Adrianople", after Murad I) following the total collapse of the Bulgarian military might in the region.