Between April and June of that year, all the army units were moved to a newly independent Poland, across Germany in sealed train cars. Weapons were secured in separate compartments and kept under guard to appease German concerns about a foreign army traversing its territory. Immediately after its arrival, the divisions were integrated into the regular Polish Army and sent to the front lines to fight in the Polish–Ukrainian War, which was being contested in eastern Galicia. The perilous journey from France (through revolutionary Germany) to Poland in the spring of 1919 was documented by those who lived through it.