1. the sussex pledge to stop attacks on unarmed ships. 2. the sinking of the lusitania by germany 3. the us declares war on germany 4. germany announces the resumption of unrestricted submarine warfare. arrange these items in correct chronological order.
a) 1,2,3,4
b) 1,2,4,3
c) 1,4,3,2
d) 2,1,4,3

The correct answer is D.

Although the RMS Lusitania was a British ship, when it was sunk by a German submarine in 1915, 234 American citizens died. Nevertheless, in 1916 the Sussex Pledge took place, being a promise made by Germany in which they claimed to attack with no previous warning any armed ship. However, in March 1916 Germany torpeded a French ship that had no weapons, meaning this, and announcing Germany the resimption of unrestricted submarine warfare. Finally, based on the German decission and having reasons because of the Lusitania deceased people, the US declares war on Germany in April 1917.

the emancipation proclamation was the aim of the war change to include the freeing of slaves in addition to preserving the union. the 13th amendment, which abolished slavery in the u.s. was passed on december 6th 1865.

as promised, lincoln waited to unveil the proclamation until he could do so with success from the union military advance. on september 22nd 1862, after a victory at antietam, he publicly announced a preliminary emancipation proclamation, declaring all slaves free in the rebellious states as of january 1st 1863.