No, "squad" does not have a long vowel. The 'a' in "squad" makes the short vowel sound as in "cat".
The noun 'squad' is a standard collective noun for:a squad of fire fightersa squad of policea squad of soldiersa squad of beaters
Flight Squad - 1998 Trial by Fire was released on: USA: 23 March 2001
Three four man fire teams
Combustion of instantly compressed diesel vapour or gas
For obvious reasons between makes and models, this varies.
Fire Team, or squad
A fireteam is a military team composed of four or less members. The four members are Squad leader, Support gunner or supressor, rifleman, and grenadier. A fire team is a unit in a Squad. A Squad's leader is called the "NCO".
In the US military, you'd probably be referring to a squad's Automatic Rifleman, who carries the M249 SAW. Each fire team in an infantry squad has one, and their role is suppressive and supporting fire, particularly to lay down covering fire while the other fire team bounds, flanks around, or moves otherwise.
Fire team, squad, platoon, or A-team
fire squad!
Felony Squad - 1966 Man on Fire 2-24 was released on: USA: 4 March 1968