Information: - The RPG-6 (Russian >"Ruchnaya Protivotankovaya Granata", "Handheld Anti-Tank Grenade") was a Soviet-era anti-tank hand-grenade used during the late World War II and early Cold War period. (RPG was the Russian designation, not the more usual abbreviation of "rocket-propelled grenade"). It operated on the "Monroe effect" principle, in which a metal-lined cone-shaped explosive charge would generate a focused jet of hot metal that could penetrate armor-plate. It underwent testing in September 1943, and was accepted into service in October of the same year. - The RPG - 43 ( for ruchnaya protivotankovaya granata meaning '' hand - held anti-tank grenade '' ) was a high explosive anti-tank ( HEAT ) hand grenade used by the Soviet Union during the Second World War . It entered service in 1943 , replacing the earlier model RPG - 40 . The RPG - 43 used a shaped charge HEAT warhead , whereas the RPG - 40 used the simpler HE ( high explosive ) warhead . The RPG - 43 had a penetration of around 75 mm of rolled homogeneous armour at a 90 degree angle . Later in the war , it was improved and became the RPG - 6 . - World WarII (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the world's nationsincluding all of the great powerseventually forming two opposing military alliances: the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. In a state of "total war", the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources. Marked by mass deaths of civilians, including the Holocaust (in which approximately 11 million people were killed) and the strategic bombing of industrial and population centres (in which approximately one million were killed, and which included the atomic bombings of Hiroshima and Nagasaki), it resulted in an estimated 50 million to 85 million fatalities. These made World WarII the deadliest conflict in human history. - Rolled homogeneous armor (RHA) is a type of armor made of a single steel composition, as opposed to layered or cemented armor. Its first common application was in tanks. It fell out of use after World War II as new anti-tank rounds were developed, against which it was ineffective. Today, the term is primarily used to measure the equivalent thickness of armor or the penetration ability of armor-piecing missiles. Given the paragraphs above, decide what entity has the relation 'conflict' with 'world war ii'.
Answer:
rpg-43