Gambling on the horses wasn’t actually legal in Delaware for a couple more centuries though, and although during these puritanical times gambling remained extremely popular, placing a bet on the horses was always done in the shadows.
The first race-track established way back in 1760, almost three decades before Delaware became the first US state. The state of Delaware (DE) has a long history of gambling, going as far back as colonial times.
Gambling History in the US State of Delaware