mounted

騎馬警察

police officers who ride horses, especially for crowd control or in parks

騎馬パトロール

a group of soldiers or police officers on horseback who guard an area

ある地域を警備する騎馬の兵士や警察官のグループ

騎兵

a soldier who fights on horseback, also known as cavalry

馬に乗って戦う兵士、騎兵とも呼ばれる

a knight who is riding a horse, typically in a historical or fantasy context