Complex sentence: The president of Lithuania, Antanas Smetona, proposes armed resistance but as he doesn't get support from government or armed forces, he decides to leave the country, so that he could not be used to legalise the occupation.
Split into simpler sentences: The president of Lithuania, Antanas Smetona, proposes armed resistance. Failing to secure support from government or armed forces, he decides to leave the country, so that he could not be used to legalise the occupation.