60 years ago today - Jul 20, 1951

[General] Because the Korean War reduced the number of young elders being called as missionaries, the First Presidency issued a call for seventies to help fill the need. Many married men subsequently served full-time missions.

[Source: Church News: Historical Chronology of The Church of Jesus Christ of Latter-day Saints, http://www.ldschurchnews.com/articles/58765/Historical-chronology-of-The-Church-of-Jesus-Christ-of-Latter-day-Saints.html]