When it says that "The United States found itself fighting a war on two fronts" it means that the US was involved in a war where they were forced to fight in two different locations. For example, the United States faced a two front war during World War II. The US was forced to fight in the Pacific Ocean against the Japanese Empire while also fighting against Germany in Europe.
A two front war makes it much more difficult for a country to have success, as they need to split up their resources between two different places instead of having them concentrated in one area.
The answer is true.
There have been some disruption such as the acts of the Red Army Faction
but West Germany had a stable government where various political parties have
been able to take part on national issues.
Just like other countries the political trends vary depending on which
party governs the government.
