[citation needed] Józef Jagmin took part in the November Uprising in Lithuania under the command of General Henryk Dembiński, and then in Warsaw, after its collapse he emigrated to France.
As a major, he served in the Polish regiment of the Sultan Cossacks of General Władysław Zamoyski against Russia during the Crimean War in 1853–1856, then he returned to France.
In 1863 he took part in the January Uprising as the commander of the branch in the Lublin region.
In the next Russo-Turkish war in 1877 as a colonel (according to other sources, major), He was the founder and commander of Polish Legion (with a force of about 65 people) operating within the Turkish army.
He died as a result of wounds sustained in the Battle of Ezki Zagra in Bulgaria (some sources incorrectly state Kizlar in the Caucasus).