The Ordnance QF 4.5-inch howitzer was the standard British Empire field (or "light") howitzer of the First World War era. It replaced the BL 5-inch howitzer and equipped some 25% of the field artillery.

The Ordnance QF 4.5-inch howitzer was the standard British Empire field (or ‘light’) howitzer of the First World War era. It replaced the BL 5-inch howitzer and equipped some 25% of the field artillery.

Tests began in 1906, and in 1908 these new field guns, now designated Ordnance QF 4.5 inch Howitzer, were deployed to active units. 182 were built by the start of WW1, and production numbers would increase to 3,384 by the end of the war; they saw widespread use during WW1.

Handbook for the 4.5-inch Q.F. Howitzer (Land Service), 1915. 40/W.O./2619. Probably produced by the Woolwich Arsenal, Great Britain

By 1908 it was obsolete and replaced in British Regular Army brigades by the modern QF 4.5-inch howitzer. Territorial Force brigades, however, continued to use the howitzer in World War I into 1916, including notably at the ANZAC and Suvla beachheads, Gallipoli, and in …

4.5 inch Howitzer Approved for service on 19 March 1909 although the 4.5 inch Howitzer was first issued in 1908, it remained in service until declared obsolete on 13 September 1944. Due to be replaced by the 25 pdr, it was still in service in 1939 and served with the British Expeditionary Force in France & Belgium.

The 4.5-inch Howitzer was introduced before WW1. It was a 'light howitzer' and the equivalent of the German 10.5 cm howitzer of that period. It was used in various theatres in the first 2 or 3 years of WW2.

2009年5月23日 · Ordnance QF, 4.5-inch Howitzer Mark II Marker. Inscription. British commanders who has fought in the Boer War in South Africa, 1899 to 1903, were impressed with the success of the enemy's howitzers. After five years, the British army approved its own new howitzer.

The BL 4.5 inch medium gun was a British gun used by field artillery in the Second World War for counter-battery fire. Developed as a replacement for the BL 60-pounder gun it used the same carriage as the BL 5.5-inch medium gun but fired a lighter round further.

The 4.5-Inch Howitzer was primarily designed for indirect fire when the target could not be seen. In indirect fire, the bearing and elevation angle for each gun is calculated by the gun plotting officer and therefore each gun has to be set to the bearing and elevation angles demanded.