The Islamic State organization has intensified its messaging campaign over recent days, distributing new propaganda materials that call on its members and international recruits within Syria to maintain their armed resistance against government forces and avoid surrendering or departing the nation.
This messaging campaign arrives during a critical period as Syrian authorities work to strengthen security measures across eastern territories and desert regions, where dormant ISIS cells continue periodic operations. Security analysts interpret this latest communication as the group’s effort to capitalize on current security challenges and reassert itself as a viable fighting force following years of military defeats and loss of controlled areas.
The statement credited to ISIS particularly targeted international combatants, asserting that Syrian government forces would systematically eliminate them and encouraging participation in what the organization termed a fresh combat phase. The communication also promoted attacks on Syrian military and security personnel, with specific emphasis on Deir ez-Zur, Raqqa, and desert territories where ISIS has maintained sporadic activity in recent months.
Security specialists monitoring Syrian developments view this messaging as ISIS’s attempt to strengthen both its media visibility and military operations while working to reawaken inactive cells and consolidate remaining fighters following substantial casualties over recent years.
ISIS initially appeared publicly in Syria during 2013, expanding from Iraq during the Syrian conflict’s upheaval and declining security environment. Originally known as the Islamic State in Iraq and al-Sham, the organization eventually separated from al-Qaida and engaged in violent conflicts with Syrian opposition groups.
The group achieved maximum influence between 2014 and 2015, capturing extensive areas throughout Syria and Iraq, including Raqqa city, which it designated as its caliphate headquarters, plus significant portions of Deir ez-Zor, desert regions, and Iraqi border zones. During this period, the organization maintained extensive networks of domestic and international fighters, funded through petroleum sales, taxation, smuggling operations, and comprehensive media campaigns that recruited thousands of global participants.
Throughout its expansion period, ISIS became among the region’s most extreme and structured militant organizations, drawing thousands of international fighters from Arab, Asian, European, Caucasian, and North African nations.
United Nations and Western intelligence assessments suggest over 40,000 international fighters joined ISIS in Syria and Iraq from 2013 to 2017. The organization subsequently weakened through military campaigns by the US-led coalition, combined with Syrian army operations, Russian forces, and Syrian Democratic Forces, losing major strongholds and ultimately its final territorial base in Baghouz during 2019. Since then, the group has transitioned to covert operations using small mobile units rather than direct territorial administration.
Current attacks primarily involve ambushes, explosive devices, targeted killings, and swift strikes on checkpoints and military installations, particularly throughout the expansive Syrian desert between Homs and Deir ez-Zor and remote areas along the Iraqi frontier. A February 2025 UN Security Council Analytical Support and Sanctions Monitoring Team assessment estimated ISIS strength in Iraq and Syria at 1,500 to 3,000 fighters, with most, including senior leadership, located in Syria. These combatants reportedly function in small units supported by logistical networks, smugglers, and sympathizers facilitating movement and supply operations.
UN investigators and counterterrorism specialists report thousands of foreign nationals with suspected ISIS connections remain in al-Hol, Roj, and other detention centers operated by the Syrian Democratic Forces in northeastern Syria. The uncertain situation of international fighters continues as a significant security challenge, with UN observers cautioning that extremist networks in Syria benefit from ongoing instability and limited government control in certain regions.
Security experts believe ISIS’s recent appeal to these fighters demonstrates organizational concerns about losing remaining experienced personnel while attempting to mobilize them for guerrilla warfare and prolonged conflict strategies.
Abdul Rahman Riyad, a Syrian affairs analyst specializing in security and political developments, explained to The Media Line that the recent message demonstrates ISIS’s efforts to take advantage of transitional periods or security changes to reactivate its cells. He noted the organization recognizes its inability to maintain broad territorial control and now depends on propaganda, incitement, and attrition tactics through small mobile units. He observed that the group’s emphasis on international fighters reveals concerns about the breakdown of its remaining human and military resources.
Retired Brig. Gen. Mustafa al-Sheikh, a security and strategic affairs expert, stated to The Media Line that ISIS cannot return to its traditional 2014 formation, but continues threatening security through flexible cell operations and desert mobility. He described ISIS’s current reliance on quick ambushes, limited nighttime operations, and targeting military transportation and supply routes, explaining that the current version emphasizes guerrilla tactics and security exhaustion over direct urban control.
Syrian academic and political researcher Dr. Mahmoud al-Hamza told The Media Line that ISIS’s latest appeal contains more propaganda and psychological elements than indicators of significant military resurgence. He explained the group seeks to maintain its reputation among supporters following years of defeats, emphasizing mobilizing rhetoric and portraying continued activity despite ongoing security pressure. He added that ISIS exploits security weaknesses and economic or social crises to rebuild covert networks, particularly in desert and border areas that remain challenging to secure completely.
Syrian authorities maintain the group’s threat remains manageable. A security spokesperson for the Syrian Interior Ministry told The Media Line that security agencies continue closely monitoring ISIS cell activities and have recently prevented multiple plots while arresting organization-linked individuals.
The spokesperson, whose identity remains confidential for security purposes, indicated that recent propaganda messages demonstrate the organization’s weakness rather than actual ground strength. Security forces continue desert and eastern Syria operations and will prevent terrorist threats from reemerging through intensive security and intelligence coordination designed to prevent exploitation of security gaps.
While ISIS no longer maintains the military and political capabilities that previously enabled its self-proclaimed caliphate, recent developments suggest the organization’s threat persists as it continues seeking opportunities to exploit instability and security vulnerabilities to reactivate armed networks within Syria. As Syrian forces and allies maintain pursuit operations, the international fighter issue and northeastern Syria camps remain among the country’s most complex challenges, with growing concerns these environments could foster extremism resurgence in coming years.
