Her brother Vaslav was on its western side , eventually in Austria .
At the start of World War I , Nijinska and her husband and daughter , and her mother , were caught on the eastern side of the Eastern Front .
Nijinska 's brother Vaslav was on its western side , eventually in Austria .
At the start of World War I , Nijinska and her husband and daughter , and her mother , were caught on the eastern side of the Eastern Front .