To help Bulgaria repulse the rapid Ottoman advance in Thrace, Russia threatened to attack the Ottoman Empire through the Caucasus, and send its Black Sea Fleet to Constantinople; this caused Britain to intervene.
Et aidata Bulgaarial tõrjuda kiiret Osmanite edenemist Traakias, ähvardas Venemaa rünnata Osmanite riiki Kaukasuse kaudu ja saata oma Musta mere laevastiku Konstantinoopolisse; see sundis Suurbritanniat sekkuma.