Simplify the following text for a Grade 7 native English-speaking person.
Original: The modern Coast Guard can be said to date to 1915 , when the Revenue Cutter Service merged with the United States Life-Saving Service and Congress formalized the existence of the new organization .
Simplified: The modern United States Coast Guard was started on January 28 , 1915 when the U. S. Congress ordered the Revenue Cutter Service and the Life-Saving Service to be put together .