The following events occurred in May 1913:
May 30, 1913: Treaty of London splits the Ottoman Empire
May 26, 1913: Igor Sikorsky introduces the first four-engine airplane, the Russky Vityaz bomber
May 30, 1913: Eastern Europe, before and after
May 30, 1913: Jules Goux wins the 3rd Indianapolis 500
The following events occurred in October 1913:
October 7, 1913: Ford Motor Company inaugurates its first moving assembly line
October 16, 1913: Royal Navy launches its first oil-powered warship, HMS Queen Elizabeth
October 14, 1913: 439 coal miners killed in Wales, rescuers unable to find survivors inside