The Eisenhower Plan
By June 1937 it has become clear that the MacArthur plan is unworkable due to financial reasons, not to mention lack of sufficient cadre, training facilities, weapons and a host of other less critical but still important factors. Eisenhower and Ord determine that the Philippine Army is not going to become large enough to provide the deterrent to Japan that MacArthur hoped. But it is possible to build an army able to deal with banditry, revolts by separatists in the southern islands and provide extra manpower that would help the US Army hold out in the Philippines long enough to weaken Japan sufficiently so that War Plan Orange can liberate the islands once the war starts. It is also possible to build a national army big enough to force the Japanese to divert very large forces to deal with partisan war, something that history shows the Filipinos are good at and one that the geography and terrain of the nation is very suitable for.
The basis of the national army will be two parts.
The Philippine Constabulary, a cross between soldiers and policemen, maintain order and deal with low level insurgencies and banditry and have been highly effective. There are already 4 regiments of them in service, around 8,000 men. Many of their NCOs and officers were detached to train the class of 1937 conscripts. Eisenhower plans to expand this force to eventually 24 small regiments of 2,000 men each, organized into 12 brigades, with half in Luzon and the rest in the other islands. This force would in peacetime consist of 24 battalions (600 men each), but upon mobilization would expand to 48,000 men able to function as military police and light infantry. To support this force there will be 6 brigades (each of 2 regiments of 1,500 men each) of construction engineers, who during peacetime would build and maintain Philippine Army camps (as well as do road construction, much needed in the islands) and in wartime they would provide plenty of manpower to build defensive works and repair them. They would also function as light infantry in a pinch. The construction engineers would have 12 battalions active during peacetime, with a mobilization strength of 18,000 men. Between the military police brigades and construction engineer brigades a total of 66,000 men will be needed, and by conscripting 11,000 men a year between 1939 and 1945 this target can be achieved by independence. In peacetime this force of 36 battalions (24,000 men including support personnel and units) should be more than capable of keeping order and ensuring that the authority of the national government is not threatened while in wartime this force is not only capable of forcing an invader to invest a sizable force to successfully invade, but would also provide a large light infantry and construction force to support the Philippine Scouts and US Army.
For 1938, the construction brigades will be called up for 4 months between January – April to build camps and support facilities for the expansion planned for next year, while conscription will be limited to the number needed to replace any conscripts found unsuitable for service. The engineers also will provide a useful place to send conscripts who are unsuitable for constabulary work. The class of 1937 conscripts will remain in the construction troops with future classes assigned to constabulary regiments or to fill out the engineers. Engineers are allowed to volunteer or can be selected for transfer to constabulary units.
The real fighting strength consists of the 11,000 men in the Philippine Scouts, which are currently as of 1937 organized into 2 infantry regiments, 1 cavalry regiment, 2 field artillery regiments, 2 coast defense regiments, and 1 engineer regiment, plus various support units in the Philippine Division and Harbor Force. This force will consist of volunteers and will expand to 4 infantry regiments, 1 cavalry regiment, 4 field artillery regiments, 4 coast defense regiments (2 of which will be anti aircraft) and 2 engineer regiments. As this force is paid at American pay scales (higher than the Constabulary troops), and volunteers are frequently turned away due to financial limitations, all that is needed to expand this force is more money. Once this force is brought up to strength a reserve infantry division will be formed consisting of 2 regular and 2 reserve infantry regiments, plus a regiment of artillery and engineers. The original 4 infantry regiments will be assigned to one of 4 regional commands (South and Central Philippines, plus the Luzon and Manila Bay Commands) with remaining engineers and artillery as a mobile reserve and the coast defense units assigned to defend the Manila Bay forts as well as new positions planned for Lingayan Gulf. Upon independence the Philippine Scouts will join the Constabulary as the Phillippine National Army, with the former Scouts being the backup to the garrison type forces of the old Constabulary.
To support this and to provide at least minimal protection of Philippine sovereignty, an air force and coast guard are needed.
The Inshore Patrol will be renamed the Philippine Coast Guard, with a similar mission in peacetime as the American version. It will ultimately consist of 2,500 regulars, who will have 4 stations (Lingayen, Bataan, Cebu and Mindanao) and 1 major facility (Cavite when it is transferred to Filipino control). It will have 24 armed motor launches (or PT boats when or if they become available), 12 armed patrol craft (converted fishing boats, yachts and tugs), 4 former US Navy gunboats, 4 minesweepers and 4 transport ships to support the ground forces if they need to deal with a problem on one of the many isands. This force will begin forming in 1939, with the armed patrol craft as the initial vessels along with the transports.
The Air Force is slated to eventually have 2,500 men organized into 3 Groups. The 1st Group will consist of training aircraft, ideally dual purpose aircraft that can perform light attack missions. The 2nd Group will consist of transport and liaison aircraft (which along with the trainers can also be used for observation missions), and the 3rd Group will have 2 fighter squadrons, 1 patrol squadron and 1 attack squadron. This is seen as sufficiently large enough to support the ground forces while being within budgetary constraints in the long run. It is scheduled to begin forming in 1938 and orders are being placed for primary and advanced trainers and a training field at Batangas is under construction. The training group will also have twin engine aircraft (that will be stationed at Clark).