Qalamoun offensive (May–June 2015)

Qalamoun offensive (May–June 2015)
	Part of the Hezbollah involvement in the Syrian Civil War and; the Syrian Civil War spillover in Lebanon
	; Battle of Western Qalamoun (2013–2017) Syrian Government & Hezbollah control Lebanese Government & Hezbollah control Syrian Opposition control For a war map of the current situation in Rif Dimashq, see here.
Date	4 May – 21 June 2015; (1 month, 2 weeks and 3 days)
Location	Qalamoun Mountains, Syria and Lebanon
Result	Pro-Syrian government victory Pro-Syrian government troops capture most of the mountainous border region and push the rebels to the outskirts of Arsal;
Belligerents
Syrian Arab Republic; Hezbollah; Amal Movement	Army of Conquest; Al-Nusra Front; Islamic Front; Free Syrian Army; Islamic State (limited cooperation with al-Nusra Front until 12 May; in conflict since 12 May);
Commanders and leaders
Gen. Ghassan; Col. Median; Ali Khalil Alian †; Marwan Mughniyeh †	Abu Maria Al-Qahtani; Abu al-Malik al-Talli (Al-Nusra Emir of Qalamoun); Abu Massab; Abu Sahib Abu al-Walid al-Maqdisi (ISIL Emir of Qalamoun); Abu Balqis al-Baghdadi †; Abdullah al-Iraqi (POW); Abu al-Baraa (POW)
Units involved
Syrian Armed Forces Syrian Army 1st Armoured Division; 3rd Armoured Division; Republican Guard Qalamoun Shield Forces; ; ; National Defence Forces; ;	Unknown
Strength
6,500 soldiers; 2,250 militiamen	1,500–4,000 militants 1,500 militants
Casualties and losses
75 killed	244–300 militants killed; (pro-Syrian gov. claim); 42+ militants killed; (SOHR claim) 48 militants killed; 47 militants captured

The Qalamoun offensive (May–June 2015) was an offensive led by the Iranian-backed Lebanese Shia militia Hezbollah, supported by the Syrian Arab Army, during the Syrian civil war, against Sunni Islamist al-Nusra Front and other Syrian opposition forces entrenched in the mountains of the Qalamoun region.