Who says the other branches of service are hostile to Marines!? Heck, let's ask them and see what they think, shall we?
United States Army (USA):
"Why in hell can't the Army do it if the Marines can. They are the same kind of men; why can't they be like Marines."
"
The deadliest weapon in the world is a Marine and his rifle."
Gen. John J. "Black Jack" Pershing, USA; 12 February 1918
"If I had one more division like this First Marine Division I could win this war."
General of the Armies Douglas McArthur in Korea
"We have two companies of Marines running rampant all over the northern half of this island, and three Army regiments pinned down in the southwestern corner, doing nothing. What the hell is going on?"
Gen. John W. Vessey Jr., USA, Chairman of the the Joint Chiefs of Staff
during the assault on Grenada, 1983
United States Navy (USN):
"
By their victory, the 3rd, 4th and 5th Marine Divisions and other units of the Fifth Amphibious Corps have made an accounting to their country which only history will be able to value fully. Among the American who served on Iwo Island, uncommon valor was a common virtue."
Admiral Chester W. Nimitz, U.S. Navy
"
The Marine Corps has just been called by the New York Times, 'The elite of this country.' I think it is the elite of the world."
Admiral William Halsey, U.S. Navy
"
Marines I see as two breeds, Rottweilers or Dobermans, because Marines come in two varieties, big and mean, or skinny and mean. They're aggressive on the attack and tenacious on the defense. They've got really short hair and they always go for the throat."
- RAdm. "Jay' R. Stark, U.S. Navy
Civilians in Government Service:
"
The Marines I have seen around the world have the cleanest bodies, the filthiest minds, the highest morale, and the lowest morals of any group of animals I have ever seen. Thank God for the United States Marine Corps!" Eleanor Roosevelt, 1945.
"
The raising of that flag on Suribachi means a Marine Corps for the next 500 years."
James Forrestal, Secretary Of The Navy
"They told (us) to open up the Embassy, or "we'll blow you away." And then they looked up and saw the Marines on the roof with these really big guns, and they said in Somali, "Igaralli ahow," which means "Excuse me, I didn't mean it, my mistake".
Karen Aquilar, in the U.S. Embassy; Mogadishu, Somalia, 1991
It's called
Esprit de Corps:
In December of 1998, a Marine officer relayed a story told by Lt.Gen. Tommy R. Franks, who commands the 3rd U.S. Army and U.S. Army Forces Central Command:
"After all the briefs, the general ended the meeting relating a visit he made with the American ambassador to (Battalion Landing Team) 2/4 today, just hours after the accident," the officer wrote. "The general reminded the assembled officers that Marines live in holes and don't have a house to live in like 'heavy forces.' No tank or lots of tents to sleep in. They carry their 'house' on their back and they live in fighting holes. Although the Marines had just lost a buddy (in a humvee accident), their spirit was 'uplifting'.
"He said a question by the ambassador to a Marine private drove the point home. The ambassador asked a private sitting in his hole, 'how is it here in the hole?' The private answered, 'Kind of like the beach without water.' The ambassador then asked, 'If you could get something, what would you like to have?'
"Lt. Gen. Franks related most of us would have answered, 'a hot meal', 'a cot', 'a shower,' but this Marine private said, 'I could use some more ammunition.'
-Elgalad