Complex sentence: After a series of serious Austrian defeats in 1849, the Austrian State came close to the brink of collapse, thus the new young emperor Franz Joseph I had to call for Russian help in the name of the Holy Alliance.
Split into simpler sentences: After a series of serious Austrian defeats in 1849, the Austrian State came close to the brink of collapse. Thus, the new young emperor Franz Joseph I had to call for Russian help in the name of the Holy Alliance.