The main Bulgarian attack was planned against the Serbs with their 1st, 3rd, 4th and 5th Armies, while the 2nd Army was tasked with an attack towards Greek positions around Thessaloniki.
Bulgaaria peamine rünnak oli kavandatud 1., 3., 4. ja 5. armeega serblaste vastu, samas kui 2. armee ülesanne oli rünnata Kreeka positsioone Thessaloníki ümnber.