The Islamic State terror organization has dramatically intensified its messaging this week, distributing new propaganda materials that encourage members and international fighters within Syria to “continue fighting” against Syrian government forces while discouraging surrender or departure from the nation.
This messaging campaign arrives during a critical period as Syrian leadership works to strengthen security oversight across eastern territories and desert regions, where dormant terror cells continue sporadic operations. Security experts indicate this latest communication represents the organization’s strategy to capitalize on current security vulnerabilities and reestablish itself as an active threat following years of military defeats and loss of controlled territory.
The statement credited to ISIS specifically targeted international fighters, asserting that Syrian government forces “will gradually eliminate them” while encouraging participation in what the group termed a “new phase of fighting.” The communication also promoted strikes against Syrian military and security personnel, particularly targeting Deir ez-Zur, Raqqa, and desert areas where ISIS has maintained irregular operations recently.
Security analysts monitoring Syrian developments view this messaging as ISIS’s effort to reassert both media influence and military capability while attempting to revive inactive cells and reorganize surviving fighters following substantial casualties over recent years.
ISIS initially appeared publicly in Syria during 2013, expanding from Iraq during the Syrian conflict’s chaos and deteriorating security environment. Originally operating as “Islamic State in Iraq and al-Sham,” the organization eventually separated from al-Qaida and engaged in violent conflicts with Syrian opposition groups.
From 2014 to 2015, ISIS achieved maximum strength after capturing extensive territories throughout Syria and Iraq, notably seizing Raqqa city, which it proclaimed the “capital of the caliphate,” along with significant portions of Deir ez-Zor, Syrian desert areas, and Iraqi border regions. During this period, the organization maintained extensive networks of domestic and international fighters, plus funding through petroleum sales, taxation, smuggling operations, and comprehensive media campaigns that recruited thousands of global fighters.
Throughout its expansion period, ISIS developed into one of the region’s most extreme and structured militant organizations, attracting thousands of foreign combatants from Arab, Asian, European, Caucasus, and North African nations.
United Nations and Western intelligence estimates suggest over 40,000 international fighters joined ISIS in Syria and Iraq between 2013 and 2017. However, the group progressively weakened following military campaigns by the US-led international coalition, combined with Syrian army operations, Russian forces, and Syrian Democratic Forces (SDF), leading to major stronghold losses and culminating in its final territorial defeat at Baghouz in 2019. Subsequently, the organization transitioned to covert operations using small mobile units rather than direct territorial governance.
Current attacks primarily involve ambushes, improvised explosives, targeted killings, and swift strikes on checkpoints and military installations, especially throughout the expansive Syrian desert between Homs and Deir ez-Zor and remote areas along the Iraqi border. A February 2025 UN Security Council Analytical Support and Sanctions Monitoring Team report estimated ISIS maintains 1,500 to 3,000 fighters across Iraq and Syria, with most leadership concentrated in Syria. These operatives reportedly function in small units supported by logistical networks, smugglers, and sympathizers facilitating movement and supply chains.
UN investigators and counterterrorism specialists report thousands of foreign nationals with suspected ISIS connections remain in al-Hol, Roj, and other SDF-operated detention centers throughout northeastern Syria. The unresolved foreign fighter situation continues presenting major security challenges, with UN monitors cautioning that extremist networks in Syria still exploit instability and limited government control in certain areas.
Specialists believe ISIS’s recent appeal to these fighters demonstrates organizational concerns about losing remaining experienced personnel while attempting to mobilize them for new operations focused on guerrilla tactics 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 “reflects ISIS’s attempt to exploit any transitional phase or security shifts in order to reactivate its cells.” He noted the organization recognizes its inability to maintain broad territorial control and now depends on propaganda, incitement, and attrition strategies using small mobile units. He also observed that targeting foreign fighters reveals concerns about fragmenting remaining human and military resources.
Retired Brig. Gen. Mustafa al-Sheikh, a security and strategic affairs expert, told The Media Line that ISIS “is no longer capable of returning in the traditional form it appeared in during 2014, but it still poses a security threat due to the flexibility of its cells and their ability to move through desert regions.” He described how ISIS currently employs rapid ambushes, limited nighttime operations, and targeting military transportation and supply routes, explaining that “what we are witnessing today is a different version of the organization, one that depends more on guerrilla warfare and security exhaustion than on direct control of cities.”
Syrian academic and political researcher Dr. Mahmoud al-Hamza told The Media Line that ISIS’s latest communication contains “more propaganda and psychological dimensions than indications of a broad military comeback.” He explained the group attempts to maintain its reputation among supporters following years of defeats, emphasizing mobilizing rhetoric and projecting active operations despite ongoing security pressure. He added that ISIS exploits security weaknesses or economic and 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 to monitor ISIS cell movements closely” and have successfully prevented multiple plots and arrested organization-linked individuals in recent months.
The spokesperson, whose identity remains confidential for security purposes, stated the recent propaganda messages “reflect the weakness the organization is experiencing more than any real strength on the ground.” Security forces continue desert and eastern Syrian operations and will prevent terrorist threats from reemerging through intensive security and intelligence coordination preventing exploitation of security gaps.
While ISIS no longer maintains the military and political capabilities that previously enabled establishing its proclaimed “caliphate,” recent developments suggest the organization’s threat persists as it continues seeking opportunities to exploit instability and security vulnerabilities for reactivating armed networks within Syria. As Syrian forces and allies maintain pursuit operations, the foreign fighter issue and camps throughout northeastern Syria remains among the country’s most complex challenges, amid increasing concerns these environments could foster extremism resurgence in coming years.
