Throughout the book, comparative analyses reveal differences and similarities in American, British, Japanese, and German naval construction. Heinrich shows that US and German shipyards introduced electric arc welding and prefabrication methods to a far greater extent than their British and Japanese counterparts between the wars, laying the groundwork for their impressive production records in World War II. While the American and Japanese navies relied heavily on government-owned navy yards, the British and German navies had most of their combatants built in corporately-owned yards, contradicting the widespread notion that only US industrial mobilization depended on private enterprise.