Passage: There was however much harsh treatment of POWs in Germany, as recorded by the American ambassador to Germany (prior to America's entry into the war), James W. Gerard, who published his findings in "My Four Years in Germany". Even worse conditions are reported in the book "Escape of a Princess Pat" by the Canadian George Pearson. It was particularly bad in Russia, where starvation was common for prisoners and civilians alike; a quarter of the over 2 million POWs held there died. Nearly 375,000 of the 500,000 Austro-Hungarian prisoners of war taken by Russians perished in Siberia from smallpox and typhus. In Germany, food was short, but only 5% died.The Ottoman Empire often treated prisoners of war poorly. Some 11,800 British soldiers, most of them Indians, became prisoners after the five-month Siege of Kut, in Mesopotamia, in April 1916. Many were weak and starved when they surrendered and 4,250 died in captivity.During the Sinai and Palestine campaign 217 Australian and unknown numbers of British, New Zealand and Indian soldiers were captured by Ottoman Empire forces. About 50% of the Australian prisoners were light horsemen including 48 missing believed captured on 1 May 1918 in the Jordan Valley. Australian Flying Corps pilots and observers were captured in the Sinai Peninsula, Palestine and the Levant. One third of all Australian prisoners were captured on Gallipoli including the crew of the submarine AE2 which made a passage through the Dardanelles in 1915. Forced marches and crowded railway journeys preceded years in camps where disease, poor diet and inadequate medical facilities prevailed. About 25% of other ranks died, many from malnutrition, while only one officer died.The most curious case came in Russia where the Czechoslovak Legion of Czechoslovak prisoners (from the Austro-Hungarian army): they were released in 1917, armed themselves, briefly culminating into a military and diplomatic force during the Russian Civil War.

Question: Who mostly made up the british soldiers in the Siege of Kut?
Indians