Complex sentence: The next step up in firepower available in Australia was the 25 pounder (87.6 mm, 3.45 in) gun-howitzer, this was quickly redesigned as a tank gun using experience gained from the work on the Short 25 Pounder.
Split into simpler sentences: The next step up in firepower available in Australia was the 25 pounder (87.6 mm, 3.45 in) gun-howitzer. This was quickly redesigned as a tank gun using experience gained from the work on the Short 25 Pounder.