Insignia Description
A gold color metal and enamel device 1 1/4 inches (3.18 cm) in height consisting of the shield, crest and motto of the coat of arms.

Symbolism
The shield is scarlet for Artillery. The stand of grape is to commemorate the remark attributed to General Zachary Taylor at the Battle of Buena Vista, “A little more grape, Captain Bragg.” The tower represents participation of a battery under Major Robert Anderson in the defense of Fort Sumter in 1861. The maple leaf commemorates service in the War of 1812, in Canada.

History
The distinctive unit insignia was originally approved for the 1st Field Artillery Regiment on 27 November 1923. It was redesignated for the 1st Field Artillery Battalion on 8 March 1951. It was cancelled on 21 April 1959. It was restored and authorized for the 1st Field Artillery Regiment on 1 September 1971. The insignia was amended to correct the description on 16 February 1979.

Source: The US Army Institute of Heraldry