John certainly did not know that simply because of the different starting points and angles of his analysis, he became a "rising political star" endowed with vision in the eyes of President Roosevelt. At this point, he had accepted the assignment from Chief of Staff Marshall and began his first job as a private military adviser to the president.

As a military adviser to the President of the United States, even if temporary, John had a lot to prepare. The first is to have a comprehensive and systematic understanding of the war preparedness plans of the US government and military. After signing a series of confidentiality agreements, John was in a sealed office in the Operations Planning Division and met the legendary "Rainbow Project" 1-5.

Unlike the all-encompassing "color plan" that the United States began to formulate after World War I, these five sets of "rainbow plans" were formulated by the United States only after the outbreak of World War II. The former is a series of battle plans for a single country, with one color corresponding to an imaginary enemy. However, as the war spread and more and more countries were involved in the war, the U.S. government and military began to realize that their independent national combat plans could no longer meet the needs of a world war, so they began to develop an overall national strategic plan. Because the project involves many countries and contains many colors, it was named "Rainbow".

In his previous life, John had heard the name of the "Rainbow Project" very well, but he didn't know much about the specifics of it. In this life, when he was in the battle planning department, he had also heard the name "Rainbow Project". However, because this plan involves the country's highest security strategy and is extremely secretive, he did not have the opportunity to contact it personally.

This time, he finally had the privilege of seeing five sets of "Rainbow Project". Although it was not the whole content of the plan and did not include a specific battle plan, it still gave John a lot of new insights into the national strategic thinking of the United States during World War II.

In general: the Rainbow 1 plan envisaged a war situation in which the United States was alone in the middle of a war against Germany, Italy, and Japan, and the objectives of the US armed forces were limited to the defense of the Western Hemisphere north of the 10th parallel.

The "Rainbow 2" plan envisages that the United States, Britain, and France are in the midst of a war against Germany, Italy, and Japan, and while implementing the "Rainbow 1" plan, the United States will not exercise maximum involvement in the European continent, but will mainly assume the responsibility of defending the interests of democratic countries in the Pacific.

The Rainbow 3 program envisages the United States in a war against Germany, Italy, and Japan, and implements Rainbow 1 while defending vital U.S. interests in the western Pacific.

The Rainbow 4 program envisaged that the United States was in the midst of a war against Germany, Italy, and Japan, and that the goal of the U.S. Armed Forces was to defend the entire Western Hemisphere.

The "Rainbow 5" plan envisages that the United States, Britain, and France are in the midst of a war against Germany, Italy, and Japan, and that Rainbow 1 and 4 will be carried out, while the United States will be involved in the European continent to the greatest extent. That is, to defeat Germany and Italy first in cooperation with the allies, and to maintain a strategic defensive posture in the Pacific first.

In John's view, although these five sets of "rainbow plans" were formulated in a hurry, because the plans were formulated based on the current real international situation, from a strategic point of view, they are still a little more reliable than some whimsical "color plans" (when the "color plan" archives were declassified in the previous life, the international community was lively for a while. Even Canada, which has always had a close relationship with the United States, had a quarrel with the U.S. government for a while because of the "Red Plan" against Britain, which included the military occupation of Canada immediately after the start of the war and the use of chemical weapons to attack Canada's Atlantic ports.

After carefully reading the "Rainbow Plan" No. 1-5, John found that these five sets of plans actually completely demonstrated the wrestling between the three mainstream international strategic thinking of the United States at present.

The essence of the "Rainbow 1" plan, which was first formulated, was based on ontological defense and the United States independently controlled the entire Americas. To put it bluntly, it is a copy of the traditional Monroe Doctrine, which has a strong flavor of "isolationist" thinking.

Later, the "Rainbow 2 and 3" plans were to support Britain and France in Europe, and put their main forces in the Pacific. Among them, "Rainbow 3" is almost an expanded version of "Project Orange" (color plan for Japan). It embodies the strategic thinking of "basing on the Americas and operating the Asia-Pacific" that emerged in the United States after World War I.

The "Rainbow 4" plan was formulated under the conditions of the success of the German blitzkrieg and the surrender of France, and the core was that the United States would "single-handedly fight the war between the two oceans." The latest version of the "Rainbow 5" plan is a revision of the "Rainbow 4" plan after seeing that the UK has successfully resisted it. Both of these plans uphold the strategic thinking of "Europe first, then Asia."

From "Rainbow 1" to "Rainbow 5", John felt the change process of American national strategy since the outbreak of World War II for the first time. He knows very well that every plan, every detail, and even every change in the expression of these plans involves a game of different interests.

This also made him feel a little ridiculous that he would want to influence the strategy of "Europe first and then Asia" before. Although I didn't try to reverse the whole strategy, trying to influence it was a bit too self-conscious. At this level of national strategy, I am afraid that even Roosevelt himself could hardly exert too much personal influence on it. He's just a little temporary colonel, and he really thinks he's capable of anything if he crosses over?

John secretly admonished himself not to get carried away and inflate himself just because things were going well. Rather than wasting our efforts on such an impossible thing, it is better to use our brains on the technical aspects of material distribution. When the time comes, Stilwell and Admiral Ernest King (Chief of Naval Operations after Stark ousted Pearl Harbor) will surely thank him. And also. Historically, the British, who were bent on running away, wasted a lot of U.S. aid materials in the China-India-Burma theater. Perhaps, he can also do something in this regard.

John is wondering what space he can operate within the framework of the Rainbow 5 project. Suddenly, something more important occurred to him. Historically, there have been serious leaks of the "Rainbow 5" program. His old friend, Weidemeyer (one of the compilers of the Rainbow 5 plan), also suffered an "injustice" because of this, and since then he has lost the right to command the troops to fight.

Now, he himself is one of the insiders of the "Rainbow 5" plan, and he will not be affected by the pond fish at that time. This is no joke. This level of leakage, as long as there is the slightest suspicion, even if it is proven innocent in the end, will be put into a separate book, and it will never be related to the core. John, who was shocked into a cold sweat, immediately racked his brain to recall the information about the leak.