Je te propose quelques phrases. Tu peux choisir celles que tu veux :

In 1492, Christopher Colombus discovered America.
America has been discovered by Christopher Colombus in 1492.

In 1789, George Washington became the first president.
The first president is become George Washington in 1789.

In 1860, Lincoln decided to abolish slavery.
The slavery has been abolished by Lincoln in 1860.

In 1945, the United Stastes dropped the first nuclear bomb on Hiroshima.
The first nuclear bomb has been dropped on Hiroshima by the United States in 1945.

In 1969, Neil Armstrong was the first man to go to the moon.
The first man to go the the moon has been Neil Armstrong in 1969.

In 2001, terrorist attacks destroyed the World Trade Center.
The World Trade Center has been destroyed by terrorist attacks in 2001

In 2008, Barack Obama became the first black president of America.
The first black president of America is become Barack Obama in 2008.