My grandmother, Margaret Cerovski (nee Revay), arrived in the US from Czechoslovakia in September 1920 (she celebrated her 21st birthday while crossing the Atlantic). After being processed at Ellis Island she continued on to Pittsburgh where her brother Michael lived (their 11 brothers and sisters remained back in the "old country").
After she and my grandfather (from the Croatian region of Yugoslavia) became citizens in the 1930's Grandma thought about visiting her family because her mother was in declining health. She also wanted to take my mother and uncle, who were teenagers, with her. However, Czechoslovakia was being slowly partitioned by Nazi Germany and Slovakia, the eastern region of the country my grandmother was from, was agitating for its independence. For these reasons my grandfather wouldn't allow Grandma to take Mom and Uncle George. And then on March 15, in 1939 Czechoslovakia's beleaguered president (pictured with Hitler, below) signed over the country to Hitler, and the thought of Grandma even visiting by herself ended. WWII would begin six months later.
Although she never visited her homeland, Grandma kept in touch with her brothers and sisters. She was the middle child but managed to outlive all of her siblings and died in 1999 just six months shy of her 100th birthday.
(I've also written about the 1968 Soviet invasion of Czechoslovkia: Soviet Army Crushes Prague Spring.)