What is the simple subject in this sentence her family visited everglades national park

Trench warfare began after germany failed in its initial plan to seize france and bring a quick end to the war. negotiate a temporary truce with the allied forces. attack the allies by sea with its powerful navy. storm across the eastern front to attack russia.

(this is just for fun) "alexander hamilton had a torrid affair and "(hamilton reference) : )

Why did president johnson decide not to run for reelection in 1968?