Premise: 105mm Gun T8 was an anti-tank gun developed in the United States in mid-1940s. This gun's design was influenced by German 88 mm Pak 43/41 anti-tank guns captured by the U.S. Army in France. The development started in October 1944; the gun reached trials in February 1946. Soon afterwards the project was cancelled.
Hypothesis: The 105mm Gun T8 took over two years to produce and prepare for trials.