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.
On Feb. 3, 1917, President Woodrow Wilson announced that the United States was breaking off diplomatic relations with Germany after it had reinstituted its policy of unrestricted submarine warfare. The U.S. would declare war on Germany two months later.