T-80BVM tank equipped with reactive armor. Not long ago, at the International Aerospace and Defense Exhibition held in Seoul, a South Korean company showcased its latest K2EX main battle tank concept prototype, which attracted industry attention. This type of tank is equipped with an active defense system with surveillance cameras and phased array radar in the four corners of the turret, which can provide the tank with omnidirectional defense capabilities. In addition, a new remote-controlled weapon station has been added to the top of the tank, equipped with M2HB machine guns and individual anti drone devices. Since its inception, tanks have been the sharp and reliable cutting edge of ground forces, the backbone of maintaining the front line, and a solid support point for mobile defense. With the increasing progress of technology, new forms of combat continue to emerge, and tanks face more survival challenges. In recent years, in some military hotspots, tanks charging into battle have once again become the focus of attention, and the protective ability of tanks is the focus of attention. In fact, with the rapid development of anti tank weapons such as rockets, cruise missiles, and drones, tank protection is also moving towards intelligence, informatization, and systematization. How to effectively protect tanks in a dangerous battlefield is a topic that requires special attention today. In this issue, we will take you to learn about tank protection. T-72B1 tank equipped with reactive armor. The materials and images show the emergence of simple additional protection for tanks, which can be traced back to the era of World War I when tanks were born. In the trenches of the Somme River battlefield, the British dropped the first batch of tanks, hoping that this "secret weapon" could change the situation of both sides "squatting and shooting" and achieve good results. Not long after, they found that the armor protection capability of the "Mark" series tanks they had high hopes for was insufficient, and they were repeatedly penetrated by steel core bullets on the vertical surface of the armor. To improve the protection of tanks, engineers adopted the original stacking thickness method. Using bolts and rivets to fix a layer of temporary steel plate on the armor, as an additional armor for the tank, played a certain role in the battlefield. After the outbreak of World War II, the main participating countries found that their tanks could no longer continue to dominate the battlefield: several well concealed anti tank gun positions could easily ambush a tank formation. Another headache for tank soldiers is the enemy's elusive individual rocket launchers. Whether it is a hunter or a prey, the level of tank protection determines the answer to this question. To reduce battlefield losses, engineers and tank soldiers racked their brains to decorate their respective vehicles. For example, Nazi Germany once made such a joke: they developed magnetic anti tank torpedoes and heavily equipped their troops, believing that the Allies would also successfully replicate them in the near future and put them into practical combat. Therefore, they came up with a proactive idea - to develop anti magnetic armor. So on the battlefield of World War II, such a "miracle" appeared: the surface of some German Tiger tanks was covered with "horizontal" and "vertical" wrinkled coatings with demagnetizing effects. But compared to magnetic anti tank grenades, the Allies preferred convenient rocket launchers, so until the end of World War II, the German anti magnetic armor did not work and only increased the weight of the tank, affecting its maneuverability.