Background
During the night of 16–17 June, the Bulgarians, without an official declaration of war, attacked their former Greek and Serbian allies, and managed to evict the Serbs from Gevgelija, cutting off communication between them and the Greeks. However, the Bulgarians failed to drive the Serbs away from the Vardar/Axios river line. After repulsing the initial Bulgarian attack of 17 June, the Greek army, under King Constantine, advanced with 8 divisions and a cavalry brigade, while the Bulgarians under General Ivanov retreated to the naturally strong defensive position of the Kilkis– Lachanas line.Conflict
The Bulgarian 2nd Army commanded by General Nikola Ivanov held a line from Lake Dojran south east to Kilkis, Lachanas, Serres and then across the Pangaion Hills to the Aegean Sea. The army had been in place since May and was considered a veteran group having fought at the siege of Adrianople in theKilkis
At Kilkis, the Bulgarians had constructed strong defenses including captured Ottoman guns which dominated the plain below. The area was defended by the Bulgarian 3rd division, minus its 1st brigade. Kilkis itself was garrisoned by the 2nd brigade (Colonel Ribarov) of eight battalions, supported by several artillery batteries. Against them 38 Greek battalions attacked with 100 guns. The 3rd brigade (Colonel Kavarnaliev) covered the sector between Lake Doiran and Lake Ardzan. Following the outbreak of hostilities, reinforcements started arriving on the Bulgarian side, initially in the form of the 10th cavalry regiment which covered the flanks of the Kilkis position, and the Serres brigade which started boarding trains on 18 June. The Greek divisions attacked across the plain in rushes under Bulgarian artillery fire. On 19 June, the Greeks overran the Bulgarian forward lines everywhere but suffered heavy losses as the Bulgarian artillery fired incessantly with great accuracy guided by their observation on the hills of Kilkis. The 5th division alone suffered some 1,275 losses on that day. On 20 June, despite having committed all forces and advancing steadily, the Greeks failed to break the Bulgarian defence. The Greek Cavalry brigade detected Bulgarian reinforcements arriving by rail. As a result, the Greek HQ ordered the offensive to continue the next morning. The 10th division was ordered to disengage from the enemy at Kalinovo (renamed Soultogianneika between both world wars) and send forces southward to participate in the fighting of Kilkis while the 1st and 6th divisions (at the time engaged in the direction of Lachanas) was ordered to create a 6-battalion strong detachment plus mountain artillery to reinforce the forces attacking Kilkis on the flank. Acting under the previous order of the Greek HQ which requested Kilkis be captured by the night of 20 June, the 2nd division went forward alone. During the night of 20 June, following an artillery fire exchange, two regiments of the 2nd division crossed the Gallikos River and successively attacked the 1st, 2nd and 3rd defensive lines of the Bulgarians entering the town of Kilkis by the morning of 21 June. In the morning the rest of the Greek divisions joined the attack and the Bulgarians retreated to the north. The Greeks pursued the retreating Bulgarians but lost contact with their enemy due to exhaustion. In the three days battle around Kilkis, the Greeks suffered heavy casualties totalling 5,652 killed and wounded. An additional 276 casualties were suffered by the 10th division which had captured ( Gevgelija on 20 June and the hills of Kalinovo in the afternoon of 21 June. Approximately 500 Bulgarian soldiers, 3 guns and many rifles had been captured.Lachanas
Similar to the defense of Kilkis, the Bulgarians also had prepared defensive works at Lachanas. Like Kilkis, the hills at Lachanas provided the Bulgarians with excellent fields of fire. On 19 June, the Greek 6th division advance from Assiros (Yuvesna) toward Lachanas and succeeded in capturing the Dichalo-Klepe line after losing some 530 men. The 1st division advanced from the south and successfully captured Vertiskos. On 20 June, the two Greek divisions advanced further and joined their flanks while they made contact with the main Bulgarian defensive location of Lachanas despite the fire from the Bulgarian artillery. During the night of 20 June, the order from HQ to create a detachment to hold the forces attacking Kilkis arrived. In the morning of 21 June, the Bulgarians concentrated their artillery fire on the Greek 5th regiment. Observing the 3rd battalion withdrawing to participate in the detachment for Kilkis, the Bulgarians saw an opportunity and attacked the 1st battalion forcing it to retreat with heavy losses. A counterattack with the 2nd battalion led by the regiment commander stopped the Bulgarians. Following the fall of Kilkis in the morning, the order for the formation of the detachment was cancelled. At 15:00, the two Greek divisions attacked the Bulgarian position in close coordination with artillery and by 16:00 broke through the Bulgarian defence. The Bulgarians retreated in disorder leaving 16 guns and 500 prisoners in the hands of the Greeks. Meanwhile, the Greek 7th division had been fighting on the far east flank. On 19 June, the 7th division successfully captured the saddle of Karakoli and then continued on to capture Nigrita without resistance on 20 June. Meanwhile, a Bulgarian force consisting of regimental staff and one battalion was advancing aggressively toward Karakoli. The force was ultimately encircled and surrendered with 10 officers and 1,500 men. On 21 June, the 7th division continued its slow advance. Even though it was informed of the Bulgarian defeat and retreat over Orliako bridge, the 7th's columns advanced too slowly to block the Bulgarians. The division was heavily criticized for what was considered an unacceptable failure. The two Greek divisions suffered 2,701 killed and wounded at Lachanas while the 7th division suffered a further 199 casualties.Aftermath
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References
* * * * * * {{DEFAULTSORT:Kilkis-Lachanas, Battle of Battles of the Second Balkan War Conflicts in 1913 Battles involving Bulgaria Battles involving Greece 1913 in Bulgaria 1913 in Greece Kilkis (regional unit) June 1913 Constantine I of Greece Kilkis-Lachanas Military history of Macedonia (Greece)