On October 1, 1957, In God We Trust was first used on US paper currency. The phrase first appeared on the 1864 two cent coin, and 1866 on the nickel, quarter, half dollar, silver dollars and gold dollars. In God We Trust became the official US motto in 1956.
One of the first references of the motto of In God We Trust is in the National Anthem. In the last stanzas "And this be our motto, In God We Trust. And the Star Spangled Banner in triumph shall wave, O'r the land of the free and the home of the brave." Bearwiskers says...God Bless America!