What happened September 1910 AD

After completing his apprenticeship in September 1910, Broz used his contacts to gain employment in Zagreb and at the age of 18 joined the Metal Workers' Union and participated in his first labour protest. He also joined the Social Democratic Party of Croatia and Slavonia.

His family joined him before the end of the ballet season and they decided to remain in the West for a time, as his wife was expecting their third child. After spending the summer in La Baule, Brittany, they moved to Switzerland in early September.

He was eventually promoted to sergeant in September 1910.

On 23 September, their second son, Sviatoslav Soulima, was born at a maternity clinic in Lausanne; at the end of the month, they took up residence in Clarens.