Author Brent Droste Sadler will give a lecture at 5:30 p.m. on Wednesday, Nov. 29, at St. Mary’s College of Maryland’s St. Mary’s Hall, 47458 Trinity Church Road in St. Mary’s City.

Sadler is the author of “U.S. Naval Power in the 21st Century — A New Strategy for Facing the Chinese and Russian Threat,” a retired submariner and advisor to senior Naval Commanders and the Department Of Defense.