Contractors, Article 4. Classifications. 7058. (a) A specialty contractor is a contractor whose operations as such are the performance of construction work requiring special skill and whose principal contracting business involves the use of specialized building trades or crafts.
The United States declared war on Germany for many reasons. One of them was the sinking on neutral ships and the lusitania which killed about 148 Americans. This was not the immediate cause, another is propaganda which persuaded public opinion.
After the United States threatened with war, Spain declared war on the United States. The sinking of the battleship USS Maine on February 15 1898 at 9:30 PM in Havana Harbor did not cause the war, but it focused American attention on Cuba; the call was for an immediate resolution to the Cuban situation.