Pedzisa mutsara unotevera: Pashure porufu rwababa vake muna 1823, akaenda kuSpain uko akarwa kwenguva pfupi mukumukira kwevanhu vaida rusununguko mukurwisana nokutonga kwoudzvinyiriri kwaFerdinand VII; asati asungwa neuto reFrance. Muna 1825, akanga ari pakati peboka revazvipiri vakanyorerwa naColonel Charles Fabvier muMarseille kuti varwe muHondo yeGreece yeRusununguko. Akasvika muNauplion muna 1825, pakutanga achishanda muColonel Auguste Regnaud de Saint-Jean d'Angély's cavalry seTrooper. Myhrberg akatora chikamu mukurwisana muEubea muna 1826, akabva arwa mukuedza kubvisa Kurwiswa kweAcropolis kwaakakuvadzwa. Muna 1826, akakwidziridzwa kuva Lieutenant, gare gare achibatanidzwa muHondo yeMiddle East kwaakakuvadzwa zvakare. Akakuvadzwa muhondo kechitatu muHondo yeCape Colias, achisimudzirwa kuva Kaputeni mushure mekuguma kwayo. Muna Ndira 1827, Myhrberg akava mubatsiri waFabvier akazoshanda munzvimbo imwecheteyo kuMajor General Thomas Gordon naColonel Carl Wilhelm von Heideck. Myhrberg akabatanidzwa muHondo yePhaleron uye kuChios expedition kwaakazviratidza. Muna 1829, Myhrberg akagadzwa Commandant wePalamidi nhare naIoannis Kapodistrias. Anotya simba rinokura rebato reRussia, Myhrberg akasiya Greece muna 1831 kuti apinde muPolish November Uprising. Zvishoma zvinozivikanwa pamusoro penguva iyi youpenyu hwake, maererano nenhoroondo isina kurongwa naAnders Ramsay, Myhrberg akarwa pa
Hondo yeOstrołęka. Akabatwa navaRussia pane imwe nguva mukati mehondo asi akakwanisa kutizira kuPrussia isina kwayakarerekera, gare gare achigara muFrance.