Main message: Stand firm in spiritual warfare.

Bible references:

• V1. "sound the battle cry" (1 Timothy 1:18)

"Gird your armor on" (1 Thessalonians 5:8)

"His holy word" (Hebrews 4:12)

• V2. "foe" (1 Peter 5:8)

"Battling... fail" (1 Corinthians 16:13)(1 Timothy 6:12)

• V3. "God of all..." (Ephesians 2:8-9)

"victory won" (1 John 5:4)

"crown" (Revelations 2:10)

• Chorus: (Isaiah 41:10)(Deuteronomy 20:1-4)

Keywords: Sound, battle, Lord, Gird, strong, stand firm, holy word, marching, shield, light, thou God, Help, Rouse, soldiers, ready, steady, Onward, forward, shout Hosanna, Christ, Captain, Thy grace, prevail

Interpretation notes:

• The hymn opens with 'Sound the battle cry!' and uses a march-like 4/4 rhythm with a steady beat and frequent quarter notes. 

• The refrain also uses repeated notes and action-oriented text such as 'Rouse,' 'Ready,' 'steady,' 'onward,' and 'forward.'

• Several accidentals appear in the melody, including E natural and B natural on page 1 and additional accidentals on page 2.

• These accidentals alter the harmony and melodic color, and the melody should be sung with a buoyant feel.