Press your lips together. Air flows through your nose. Vocal cords vibrate.

Americans pronounce marched as MARCHT (/mɑrtʃt/). You'll hear it in sentences like "The army marched apart in the dark" or "The army marched far into the dark garden" — more examples below.
Record yourself saying "marched" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 4 sounds. Explore each sound's mouth shape and how it's made.
Press your lips together. Air flows through your nose. Vocal cords vibrate.

Open wide for the 'ah' vowel. Lift the tongue back and up while flaring the lips for the 'r'.
Touch the front of your tongue to the roof of your mouth, then release into a 'sh' position. Flare your lips.

Touch the tip or front edge of your tongue to the roof of your mouth just behind your teeth. Keep your jaw relaxed. Stop the air, then release with a puff.

Click any sentence to see the full breakdown — every link, every reduction, every flap-T.
The textbook way isn't wrong — it's just not how anyone actually says it.
Americans use a relaxed retroflex R — the tongue curls back rather than rolling. The R is one continuous sound with the vowel before it, not two separate sounds.