THE ARMY GOES ROLLING ALONG

"THE ARMY GOES ROLLING ALONG,"

Intro: March along, sing our song, with the Army of the free
Count the brave, count the true, who have fought to victory
We're the Army and proud of our name
We're the Army and proudly proclaim

Verse: First to fight for the right,
And to build the Nation's might,
And The Army Goes Rolling Along
Proud of all we have done,
Fighting till the battle's won,
And the Army Goes Rolling Along.

Refrain: Then it's Hi! Hi! Hey!
The Army's on its way.
Count off the cadence loud and strong (TWO! THREE!)
For where e'er we go,
You will always know
That The Army Goes Rolling Along.

Verse: Valley Forge, Custer's ranks,
San Juan Hill and Patton's tanks,
And the Army went rolling along
Minute men, from the start,
Always fighting from the heart,
And the Army keeps rolling along.
(refrain)

Verse: Men in rags, men who froze,
Still that Army met its foes,
And the Army went rolling along.
Faith in God, then we're right,
And we'll fight with all our might,
As the Army keeps rolling along.
(refrain)

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(1) Rolling along seems to me that army marches on with a roll of thunder? I didn't get "roll along".

(2)Count the brave

The meaning of the count is like it in "Count these apples"?

(3) Valley Forge?

(4) Minute men, from the start

Minute = ?