Novaya Zemlya under naval escort to deliver desperately needed Lend-Lease supplies to northern Soviet seaports. Destruction of the Allied convoys was thus a top priority for the German Navy — and brought World War II to Novaya Zemlya. The most ill-fated and one of the largest Arctic convoys, code-named “PQ-17,” left Iceland on June 27, 1942. It consisted of thirty-four merchant ships, six destroyer escorts, fifteen additional armed ships (among which were two Free-French corvettes), and three small rescue craft. The fast-moving convoy encountered ice floes on June 30 and was forced to reduce speed. On the following morning, the convoy was
Novaya Zemlya avalanche that blocked two glacial streams and created a lake in length. Over its history as a nuclear test site, Novaya Zemlya hosted 224 nuclear detonations with a total explosive energy equivalent to 265 megatons of TNT. For comparison, all explosives used in World War II, including the detonations of two US nuclear bombs, amounted to only two megatons. In 1988–1989, "glasnost" helped make the Novaya Zemlya testing activities public knowledge, and in 1990 Greenpeace activists staged a protest at the site. The last nuclear test explosion was in 1990 (also the last for the entire Soviet Union and Russia).