One of the perks of being a 'rarity' -- a 19D Armored Scout who was a pegasus, rather than an earth pony -- was that every single armored division wanted to get their hooves on her. So, even though there weren't a lot of them compared to the regular infantry divisions, she still got her pick. Like the Royal Hussars, based in Canterlot. Or even the elite Household Cavalry Regiment.