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The Australians and New Zealanders operated in III Corps (MR3=Military Region 3). This is the Saigon AO (Area of Operations).
173rd AHC was headquartered out of Lai Khe, III Corps (also known as MR3 or Military Region III); about 30 miles north of Saigon.
Australian forces operated in MR3 (also known as III Corps). They primarily fought in the battles of Long Tan, and Firebases Balmoral and Coral in '68. Australia was the only allied nation to field it's own tanks during the war; their Centurion medium gun tank (20 pounder/84mm).
The US Navy created another navy for the Viet War; the Brown Water Navy. The last time the USN had a Brown Water Navy was the US Civil War in 1861-65. Now...for 1965 they started a new one; Swift Boats (PCFs), Patrol Boat River (PBRs), Alpha Boats (ASPBs-Assault Support Patrol Boat), and Monitors (Riverine Battleships, converted WWII LCMs). MR-4 (Military Region IV or IV Corps) the Mekong Delta was the primary operational region for the US Navy Brown Water Navy (aka Riverine Forces). With over-laps in the MR3 and working along up the coast line all the way up to MRI (most commonly called I Corps) which was the DMZ (17th Parallel). Any place there was a river in South Vietnam, there might be a prowling USN riverine boat. Monitors were armed with 40mm cannons or 105mm cannons mounted in turrets. Alpha boats were the destroyers of the rivers and performed many "mine sweeps"; Swift Boats and PBRs had the firefights along the river banks mainly against recoilless rifles (57mm), RPGs, mortars, and machineguns.
Vietnam was divided by the US military into 4 Military Regions, also called Corps: MR1, MR2, MR3, MR4, or I Corps, II Corps, III Corps, IV Corps. 175's landed in country in '65. The only noted ones were SPs (Self Propelled Guns). The most dangerous AOs (Areas of Operation) in South Vietnam were the Highlands (II Corps) and I Corps; that's where the NVA were. South of those two AOs were mostly VC. The 175's appeared to be concentrated in I and II corps. Normally only one 175mm gun would be at a Firebase (also called LZ's-Landing Zones). Firebase Blackhawk at the top of the Mang Yang Pass in the Highlands had one such gun. The only good thing about 175's for non-artillerymen, was you could tell when they were going to fire it...it would lower it's tube for loading...when it raised, everyone could plug their ears; because they knew it was going to fire. The worst thing about firebases in South Vietnam was that they were very noisy. And you couldn't carry on a conversation with a 175mm banging away. Batteries of 155mm SPs were also bad, the vibrations from those guns, six to a battery (after Vietnam the army went to 8 guns per battery) would knock the paper plate full of YOUR FOOD out of your hands. And while holding your food, you couldn't plug your ears. 105mm field guns were also bad, but they were smallest batteries at a firebase, still noisy. 105's & 155's were stationed at Firebases by the battery (six guns), but the 175's seemed to be alone. See website: Weapons of the Vietnam War-15th Artillery
1986 CHEVROLET CAVALIER 2.0L 4-cyl Engine Code P1986 CHEVROLET CAVALIER 2.8L 6-cyl Engine Code W Identification 5 spds: Isuzu has a 7-bolt aluminum end cap, Muncie has a 9-bolt steel end cap. Identification of a Isuzu - Aluminum 2- piece case with a 7 bolt aluminum rear cover over the 5th gear set. = Isuzu MR3/MK7 5 SpeedIdentification of a Muncie - Aluminum 2-piece case houses all the gears with a flat steel 9-bolt plate covering the rear bearings. = Muncie 282 5 Speed.Identification 4 spd: - Aluminum 2-piece case with a solid rear case half and a 3-bolt front retainer. Saginaw M19 4 Speed. Both Require a Synchromesh Transmission Fluid. I recommend AMSOIL Synthetic Synchromesh Transmission Fluid. CAPACITIESEngine, without filter .......... 4.0 quarts [1]Cooling System, Initial Fill .......... 11.0 quartsAutomatic Transmission, 125 (3T40) Initial Fill .......... 4.0 quarts [2]Automatic Transmission, 250 Initial Fill .......... 4.0 quarts [2]Automatic Transmission, Total Fill 3 speed 3T40 .......... 6.0 quartsManual Transmission, Isuzu (5-SPD) .......... 5.5 pints [3]Manual Transmission, 4-SPD .......... 5.9 pints[1] When replacing filter additional oil may be needed. After refill check oil level.[2] With the ENG at operating TEMP, shift TRANS through all gears.Let ENG slow idle in PARK for at least 3 minutes.Check fluid level and add fluid as needed. Do not overfill.[3] Identification: Isuzu has a 7-bolt aluminum end cap, Muncie has a 9-bolt steel end cap.
National Routes are denoted with the letter N followed by a number indicating the specific route. On maps and some signage, national routes are shown by a pentagon with the number of the road inside. •N1: Cape Town - Beit Bridge (the border post to Zimbabwe, becomes the A4/A6) via Laingsburg, Beaufort West, Colesberg, Bloemfontein, Winburg, Kroonstad, Johannesburg, Pretoria, Polokwane and Musina. •N2: Cape Town - Ermelo via the Garden Route, Port Elizabeth, Grahamstown, Bisho, East London, Mthatha, Kokstad, Port Shepstone, Durban, Empangeni, Pongola and Piet Retief •N3: Durban - Johannesburg via Pietermaritzburg, Estcourt and Harrismith. •N4: Lobatse - Ressano Garcia (the border posts to Botswana and Mozambique, becomes the A2 and the EN4, respectively) via Rustenburg, Pretoria, Witbank and Nelspruit. •N5: Winburg - Harrismith via Bethlehem. •N6: East London - Bloemfontein via Queenstown and Aliwal North. •N7: Cape Town - Vioolsdrif (border post to Namibia, becomes the B1) via Malmesbury and Springbok. •N8: Groblershoop - Maseru Bridge (border post to Lesotho) via Kimberley, Bloemfontein and Ladybrand. •N9: George - Colesberg via Graaf-Reinet and Middelburg. N10: Port Elizabeth - Nakop (border post to Namibia, becomes the B3) via Cradock, Eastern Cape, Middelburg, De Aar, Prieska and Upington. •N11: Ladysmith - Grobler's Bridge (border post to Botswana) via Newcastle, Volksrust, Ermelo, Middelburg and Polokwane. •N12: George - Witbank via Oudtshoorn, Beaufort West, Kimberley, Warrenton, Klerksdorp, Potchefstroom and Johannesburg (Between Beaufort West and Three Sisters it is merged with the N1.) •N14: Springbok, - Pretoria via Upington, Kuruman, Vryburg, Krugersdorp and Centurion, Gauteng. •N17: Johannesburg - Ngwenya (border post to Swaziland, becomes the MR3) via Springs, Bethal and Ermelo. •N18: Warrenton - Ramatlabama (border post to Botswana, becomes the A1 highway) via Vryburg and Mafikeng.