May 1 in San Antonio history…
Mission San Antonio de Valero is established on the west bank of the San Antonio River after the removal of the Mission San Jose del Alamo is ordered by the Marquis Valero, viceroy of New Spain, from the Rio Grande to San Antonio.
Bexar County Medical Society passes a resolution asking for a law to protect bats in San Antonio. Dr. Charles A.R. Campbell has told the group bats were beneficial in eradicating malarial mosquitoes.
1917 – World War I
As soon as definite instructions are received from President Wilson, enrollment under the provisions of the selective conscription act will be under way in Texas. Blank forms, enrollment lists and complete instructions are on the way from the War Department to the Sheriffs in every state in the Union, and these are to be distributed by the Sheriffs to the various voting precincts in their counties.