The first American paratroopers to withdraw from Grenada flew home Friday to a hero's welcome, and the island's U.S.-installed administration expelled a large group of Soviet, Cuban and East bloc diplomats and their families.
One hundred Cuban prisoners were flown out of Grenada Friday on their way home and the leader of the defeated Cuban forces arrived in Havana to tell President Fidel Castro ''my mission is accomplished.''
U.S. officials said 400 soldiers composed the first contingent of the 82nd Airborne Division to leave Grenada, arriving at Pope Air Force Base near Fort Bragg, N.C., aboard three planes.
They were met by crowds of people who braved a cold steady rain to cheer the soldiers along streets adorned with yellow ribbons.
Army spokesmen said as many as 2,300 soldiers will be flown home in the first wave of a U.S. withdrawal, leaving behind an estimated 2,500 men.
Secretary of the Army John O. Marsh Jr. presented combat infantryman badges to three paratroopers during a ceremony at Pope. All men who served on Grenada eventually will receive the badges.
The 100 Cubans, including about 20 women, were escorted in two columns of 50 under heavy guard to two C-130 U.S. Air Force transport planes waiting at the airport at Point Salines.
One Cuban, leading the first column, defiantly puffed on a long cigar. Many wore straw hats to ward off the tropical heat and swirling dust at the airstrip. In Barbados, the prisoners boarded a Soviet-made Ilyushin 62M jetliner which took off for Havana.
The 100 prisoners were the first of 679 Cubans held by U.S. troops in Grenada to leave the island.
In Washington the State Department released documents captured in the Grenada invasion, including a secret treaty with the Soviet Union and a Cuban chronicle of Grenadian political struggles preceding the Oct. 19 killing of Prime Minister Maurice Bishop.
The July 27, 1982 agreement with the Soviets called for the delivery of Soviet weapons and the training of Grenadian troops in the Soviet Union.
The documents included a similar secret treaty between Grenada and North Korea and a treaty with Cuba establishing a permanent military liaison with a total of 40 specialists, 27 of them to be stationed on Grenada permanently.
Among the documents was an unsigned set of notes, dated Oct. 21, 1983, in which the Cubans were reported to have expressed concern at the political dissension within Bishop's New Jewel party.
The notes say, ''It is clear that the Cuban leadership does not know of the dishonesty and lying of M-B (presumably, Maurice Bishop) as well as his wickedness.''
The expulsions of diplomats from Grenada began late Thursday when two U.S. Air Force C-141 military transports flew an undetermined number of Soviets and East Germans to Kingston, Jamaica.
Two more U.S. military transport planes arrived in Merida, Mexico, on the Yucatan Peninsula's Caribbean coast, Friday morning with 126 diplomats and their families ordered out of Grenada Thursday.
American officials said the departure of the diplomats to Mexico was delayed because they tried to ''smuggle'' out a small arsenal of 38 AK-47 rifles, 300 ammunition magazines and five pistols aboard the aircraft.
State Department spokesman John Hughes said in Washington the weapons were refused after an eight-hour standoff and ''altercation.''
''The United States protested an attempt to smuggle out weapons on our aircraft,'' he said. The weapons were confiscated.
The group was later flown to Havana aboard a Soviet Aeroflot jetliner and was met by Castro. Aboard was Col. Pedro Tortolo, leader of the Cubans who battled American troops fiercely after the Oct. 25 invasion.
''My mission is accomplished,'' Tortolo told Castro with tear-filled eyes as he stepped off the jet.
A 14-member Congressional delegation led by the House Democratic whip, Rep. Thomas Foley of Washington, flew to Grenada Friday for a first-hand inspection of the tiny spice island 1,900 miles south of Miami.
At a brief stop in Barbados, Foley said the bi-partisan delegation would investigate the ''conditions on the island prior to landing'' of the American troops and how soon the soldiers would be withdrawn.
Also due to travel to Grenada Friday was Diego Cordoves, under secretary-general of the United Nations, sent by Secretary-General Javier Perez de Cuellar to report on events there.
On Grenada, British-appointed Governor General Sir Paul Scoon, who ordered the East-bloc and allied diplomats out, was trying to form an interim government he promised to announce early next week.
Officials said he had attempted to convince Alister McIntyre, a Grenadian who is deputy secretary-general of the United Nations trade agency in Geneva, to lead the provisional government until elections can be held.
President Reagan, in a somber and emotional visit to the Marine base at Camp Lejeune, N.C., led a memorial service to U.S. servicemen killed in Lebanon and Grenada and told their families the United States must risk lives ''to prevent humankind from drowning in a sea of tyranny.''
The Defense Department said 18 Americans were killed and 89 others were wounded since the invasion force landed on Grenada, which gained independence from Britain in 1974.
The task force swept into Grenada in a pre-dawn raid to restore what Reagan has called ''order and democracy'' in the wake of the Marxist coup.
