It was March 18, 1925 to be precise. It happened some two years into the Calvin Coolidge administration, perhaps the most Conservative president of the 20th Century, along with Ronald Reagan (and a favorite of the latter). Coolidge was a true American patriot and a solid Christian whose policies were certainly in harmony with God's Will. And yet nearly 700 of our countrymen lost their lives.
We are not to question God why tragedy strikes.
God is good. Satan comes to seek, steal, and destroy.
But the Bible is specific on blessings and curses for those nations who are for and against Israel.
God has conditions in 2 Chronicles 7:14 that He will forgive and heal our land if we repent and change our ways.
He doesn't answer pray for husbands who don't love their wives...
Nations are judged by their leaders. I believe that those events were the result of attempts to change the covenant borders of Isreal.