The Sinai Peninsula, a vast and historically contested desert landscape, has evolved from a buffer zone between Egypt and Israel into a critical front line for joint counterterrorism operations. Following the security vacuum created by the 2011 Arab Spring, local Salafi-jihadi factions consolidated their presence, eventually pledging allegiance to ISIS in late 2014 and designating themselves as Wilayat Sinai (the Sinai Province). Recognizing the mutual threat posed by an active Islamist caliphate on their shared borders, Cairo and Jerusalem established an unprecedented level of military and tactical alignment. This quiet partnership has fundamentally reshaped regional security and redefined the parameters of the historic 1979 Egypt-Israel Peace Treaty.
The Genesis and Rise of Wilayat Sinai
Before achieving notoriety as an ISIS affiliate, the insurgent group originally operated under the name Ansar Bait al-Maqdis, executing attacks against Egyptian infrastructure and launching rockets toward the Israeli resort city of Eilat. Following its formal alignment with ISIS, the group escalated its campaign of violence, carrying out the tragic 2015 bombing of Russian Metrojet Flight 9268 over the Sinai and launching massive armed assaults on military outposts in Sheikh Zuwaid. The group leveraged longstanding economic grievances among local Bedouin populations to establish deep-seated roots, recruit disenfranchised youth, and secure strategic smuggling networks. Consequently, the standard civilian policing forces allocated to the peninsula under the 1979 treaty proved entirely insufficient to contain the heavily armed insurgent threat.
To successfully counter this asymmetric threat, Egypt was forced to transition its military strategy from conventional warfare tactics to modern counterinsurgency methods. This strategic pivot required substantial troop increases, heavy armor deployments, and air operations in demilitarized zones, which necessitated close coordination with Israel. This tactical evolution is detailed extensively in analyses such as Egypt’s Counterinsurgency Success in Sinai by the Washington Institute. Over several years, both nations realized that maintaining rigid treaty limitations would ultimately allow ISIS to establish a permanent and highly dangerous sanctuary along the Gaza and Israeli frontiers.
Key Mechanisms of Tactical Alignment
- The Agreed Activities Mechanism (AAM): A critical safety valve embedded within the 1979 peace treaty, the AAM enabled Egypt and Israel to dynamically adjust troop levels and authorize the deployment of heavy armor, attack helicopters, and fighter jets in previously demilitarized zones of Sinai.
- Unprecedented Intelligence Sharing: Direct and continuous communication channels were established between Israeli Military Intelligence (Aman) and the Egyptian Armed Forces, facilitating the exchange of real-time satellite imagery, signal intercepts, and electronic intelligence regarding insurgent movement.
- Joint Border Security and Tunnel Interdiction: Both nations collaborated to dismantle smuggling networks along the Gaza-Sinai border, which had previously allowed Wilayat Sinai to acquire weapon components and transfer funds through illicit underground passages.
Strategic Analysis of the Sinai Alliance
The operational success of this counterterrorism campaign was largely driven by a dual-track approach combining kinetic airstrikes with local tribal engagement. To overcome the limitations of conventional forces, the Egyptian government actively mobilized the Sinai Tribal Union, a coalition of prominent Bedouin clans including the Tarabin, Sawarka, and Ramailat, to serve as scouts and local intelligence collectors. Israel, on its part, provided critical air assets, which reportedly included unmanned aerial vehicles and manned fighter jets executing precise strikes against ISIS strongholds with Egyptian authorization. While Cairo historically kept this military collaboration quiet due to domestic political sensitivities, research by the Institute for National Security Studies underscores that this close cooperation with Israel was essential to containing the Salafi-jihadi surge.
Furthermore, the elimination of Wilayat Sinai’s primary leadership, including high-ranking commanders like Abu Duaa al-Ansari, demonstrated the efficacy of joint intelligence operations. This operational framework combined Israeli technological superiority with the Egyptian military's ground forces and tribal partners, systematically degrading the group’s command and control capabilities. The success of these combined efforts is evidenced by a dramatic reduction in terrorist incidents and the restoration of state control over key urban centers such as Rafah and El-Arish. However, security analysts emphasize that maintaining these hard-won gains requires a transition from purely military operations to long-term economic development and integration for the local Bedouin population.
Geopolitical Significance for Israel
For the State of Israel, the stabilization of the Sinai Peninsula is a paramount national security victory that prevents the establishment of an active ISIS-controlled territory on its southwestern border. The collaborative campaign has turned a potential hotbed of transnational terrorism into a model of pragmatic, threat-based bilateral security cooperation that transcends historical political animosities. By allowing Egypt to project sovereignty and secure its borders, Israel has guaranteed the safety of its southern communities and critical economic infrastructure, such as the Red Sea shipping lanes and the city of Eilat. This functional alliance underscores that, while the diplomatic relations between Egypt and Israel may often be described as a cold peace, their strategic and military interdependence remains exceptionally warm, resilient, and vital for regional stability.