A vigorous character piece modeled after military band styles prevalent in French salon music. It utilizes block chords and decisive rhythms to evoke the title's theme.
Focus on the precise execution of staccato chords to convey the march character.
Comparable difficulty and character — good candidates for what to learn next.
Au porte drapeau is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 4.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Au porte drapeau lasts about 3 minutes.
Au porte drapeau is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include 100. Yıl Marşı by Hakan Ali Toker, Brigadier-Marsch by Béla Kéler, Bunker Hill by Albert Von Tilzer — see the full similar-pieces list on this page.