Meanings (ES + gloss)
escuadrón
A body of cavalry comprising two companies or troops, averaging from one hundred and twenty to two hundred soldiers.
escuadra
A detachment of vessels employed on any particular service or station, under the command of the senior officer
the North Atlantic Squadron
cuadrilla
A tactical air force unit; consists of at least two flights; multiple squadrons make up a group or wing (depending on particular air force).