This is a lively and characteristic march by the waltz king, Johann Strauss Jr. It features a buoyant rhythm and a bright, fanfare-like melody that is instantly engaging.
Practice crisp articulation and maintaining a steady, driving march rhythm.
Alliance-Marsch (Op.158) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 Alliance-Marsch (Op.158) lasts about 2 minutes.
Alliance-Marsch (Op.158) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.