Who are they ? What is their historic achievement ?

The Lesbian Gay Band Association ( LGBA ) , on the 20th of Jan , bacame the first ever Lesbian , Gay , Bisexual and Transgender ( LGBT ) group to take part in a US presidential inaugural parade .
Went uncracked !!
The Rainbow flag suggests that its some gay pride parade….!
, may b they helped in gettin the California govt. to legalise gay marriages!
so they r gays
erm…do they belong to the gay and lesbian assocation(LGBT)?
If so then the answer probably would be that they succeeded in getting same -sex marriage legalized(mostly in Californaia,i guess)
To go around the world!!!!!!!
Rainbow aka “LGBT” flag.
Pied Piper Parade