The correct term for a group of grapes is known as a bunch or cluster of grapes. A group of grapes or a fruit cluster is sometimes called a Truss. Arba Ratna.
First used during World War I, this type of warfare was highly controversial and deemed a breach of the rules of war. Resumption of unrestricted submarine warfare by Germany in early 1917 was a key reason the United States entered the conflict.
Following the use of unrestricted submarine warfare by Germany in the First World War beginning on February 1, 1917, countries tried to limit or even abolish submarines. Instead, the London Naval Treaty required submarines to abide by prize rules.