In today's era, the wave of informatization and intelligence is sweeping across the battlefield, and the era of a single military branch fighting alone is long gone. From the "left hook" of the Gulf War to the "multi domain synchronization" of modern battlefields, joint operations have become the basic form of modern warfare, gradually achieving a transition from inter branch coordination to global integration. Through the extensive combination and deep integration of combat elements, joint victory has become the iron law of modern warfare. Joint operations are the fundamental form of modern warfare, achieving efficient combat through the linkage of all domain forces, the linkage of multi domain resources, and the joint creation of cross domain effectiveness. As the form of warfare evolves towards intelligence and omniscience, "linkage" is no longer a simple "power combination" or "structural linkage", but a core hub that runs through the entire combat process, and is the key to solving the problems of "inter domain barriers", "information silos", and "efficiency dispersion". Only by grasping the winning strategy of "alliance" can we build a systematic advantage in complex battlefield games and achieve the effectiveness of "1+1>2". The 'All Union' wins over the 'Single Union'. Without alliances, there can be no victory; without alliances, there can be no war. Modern warfare has long bid farewell to the "solo play" of a single military branch or field, and entered the "big chess game" of multi domain power coordination. Single joint "is limited to local coordination within a single military branch or combat domain, such as traditional army infantry artillery coordination and navy ship ship coordination. Although they can play a role in local combat effectiveness, they rely solely on the power of a certain domain and lack multi domain support and complementarity. When facing global confrontation, they are easily subjected to" dimensionality reduction strikes "from other domains by the enemy, making it difficult to form sustained combat capabilities. 'Quanlian' is a comprehensive linkage that breaks down the boundaries and barriers between military branches and domains. It is a deep coupling of multiple domain forces such as land, sea, air, space, network, and electricity, and an organic integration of traditional combat forces and new domain and new quality forces. To achieve "full integration", the focus is on "three unifications": unified command to build a global collaborative command center, ensuring efficient command communication and real-time situational convergence; Standardize data formats, communication protocols, and collaborative processes to enable different military branches and equipment to communicate in language and synchronize actions; Unified guarantee and establishment of a comprehensive joint guarantee system to achieve cross domain allocation and precise docking of guarantee resources. Fast alliance wins over slow alliance. In the world of martial arts, speed is the only thing that cannot be broken. The battlefield situation is constantly changing, and fighter jets are fleeting. The "time difference" is the "life and death difference", and the speed of the "alliance" directly determines the ownership of the "time difference". 'Slow connection' means lagging information flow, slow power response, and inefficient efficiency aggregation. Even with multi domain combat forces, they will miss out on opportunities due to 'slow connection' and fall into a passive situation of being attacked. The key to "Fast Link" is to achieve real-time information flow, instant power response, and instant efficiency aggregation, and to form the ability to strike before the enemy completes its combat deployment, in order to win quickly. To achieve "fast connectivity", it is necessary to balance technological empowerment and capability enhancement: relying on advanced communication technology, build a fully covered, low latency, and high bandwidth communication link, ensure the "second level transmission" of reconnaissance data, command instructions, and strike parameters, and break down the time barriers of information flow; The command system is proficient in collaborative processes, accurately assesses battlefield situations, and has the ability to make quick decisions; The combat unit forms muscle memory through normalized collaborative training, ensuring immediate response and rapid linkage upon receiving instructions, without the need for repeated coordination. Significantly reducing the time difference between "discovery and attack" is precisely the prominent advantage of "fast link" compared to "slow link". Intelligent alliance wins over universal alliance. The hierarchical gap between "general alliance" and "intelligent alliance" directly determines the level of combat effectiveness of the system. The 'Universal Alliance' remains at the surface stage of 'universal basic interconnection' within the system, with each combat unit only achieving wide area transmission of basic information such as target location and its own status. Data has not been integrated into the system closed loop, standards have not been unified, and cross domain capabilities have not formed a systematic complementary adaptation. Essentially, it is still a combination of forces, making it difficult to unleash the multiplier effect of system collaboration. Intelligent connectivity "is a leap from the basic interconnection of" universal connectivity "to" system intelligence aggregation "and" global efficiency creation ". The core is intelligent connectivity across the entire domain, intelligent data integration, and precise energy release. Through intelligent mining of systematic multi-source data, intelligent coupling of cross domain combat capabilities, and intelligent linkage of global nodes, it stimulates the emergence of system level efficiency and achieves a qualitative leap in system combat capabilities. To achieve "smart connectivity", we need to focus on the intelligent integration of system data, break down the format barriers, standard differences, and permission barriers of data in various domains within the system, integrate all elements of the combat system data, accurately generate real-time dynamic system situation maps, and provide millisecond level precision support for system command decision-making, resource scheduling, and task allocation; We should focus on the intelligent integration of system capabilities, promote the intelligent adaptation and dynamic reorganization of multi domain combat capabilities within the system, break the limitations of each domain being "self-contained and fighting independently", and intelligently match the optimal combination of capabilities based on real-time battlefield situations; We need to strengthen the intelligent support at the end of the system, enhance the real-time data interaction, rapid command response, and dynamic feedback capabilities between the end and the system center, and ensure seamless intelligent linkage from the system command center to the frontline combat end, with no delay in command transmission and no deviation in collaborative cooperation. Strong alliances win over weak alliances. The modern battlefield is intertwined with soft and hard confrontation, where the enemy often uses electromagnetic interference, cyber attacks, physical destruction, and other means to disrupt the linkage link. The strength of the linkage directly determines the survival of the combat system. The prominent manifestation of "weak links" is weak anti-interference ability, insufficient redundancy design, poor self-healing ability, and susceptibility to intermittent links, distorted intelligence transmission, and disconnected command instructions due to external interference, ultimately leading to the "disconnection and incapacitation" of the combat system, and the advantages of the links built in the early stage cannot be fully utilized. The core of 'strong alliance' is to build a reliable defense line of 'uninterrupted command, system anti-interference, and sustainable links', ensuring that in complex adversarial environments,' alliance is not chaotic, interference is continuous', and providing solid support for the entire combat process. To achieve "strong interconnection", it is necessary to strengthen anti-interference protection, use advanced technology to enhance the anti-interference and anti destruction capabilities of communication links and key systems, and resist enemy "soft suppression" and "hard strikes"; To improve redundancy design, multiple links should be backed up for core command links and critical data transmission channels, and key command nodes and data resources should be synchronously backed up; To build a self-healing network, a distributed architecture is adopted to endow combat units with the ability to "autonomously network" and dynamically reconstruct to maintain the continuity of system linkage. Strong linkage "is the prerequisite and foundation for unleashing other linkage effects. Only with strong links, systems, and command can we stand firm and win the initiative in high-intensity confrontation. (New Society)