10 January] 1913 an Ottoman coup d'état returned Unionists to power, with their non-negotiable stance on retaining Edirne.

[3] On 20 February the Ottomans, in coordination with a separate attack from Gallipoli, charged the Bulgarian positions.

Although the Bulgarians repulsed the initial attack with support from the Greek Navy in the Thracian Sea, they were weakened enough that they withdrew over fifteen kilometers to the south and twenty kilometers to the west to secondary defensive positions; but eventually the lines returned to essentially the originals.

The separate siege of Edirne resulted in its loss to the Bulgarians on 26 March, sapping Ottoman morale; and with heavy Bulgarian losses to both fighting and cholera, the battle dwindled down and ceased by 3 April 1913.

[3] On 16 April a second ceasefire (armistice) was agreed to, ending the last fighting in the war.