German Plan Z was order by Adolf Hitler in January 1939 and called for a massive naval expansion. The Plan was supposed to be completed some where between 1945 and 1948. The Plan called for the construction of 6-10 battleships, 5-8 heavy cruisers, 44 light cruisers, 15 Panzerschiffe, 68 destroyers, 4-5 aircraft carriers and 230-300 U-boats. If Germany had of held off going to war in 1939 and waited until they completed the plan what effect would it have had? I think the U-Boats would have been very helpful in the “Tonnage War”. The battleships and cruisers probably would have had some success as commerce raiders. Other than that I’m not sure. They probably still would not be strong enough to stand up to the British navy in a Jutland style battle.