Question: Battle of the Ch'ongch'on River and Battle of Aachen, both occurred after which year?

Context articles: Battle of Alhandic
Third Battle of Seoul
Battle of the Ch'ongch'on River
Second Phase Campaign
Battle of Wawon
Battle of Aldenhoven (1794)
Battle of Aachen
Anju, South Pyongan
Taeryong River
Eighth Army Ranger Company

The Battle of Alhandic (Spanish: "Batalla de Alhandic" ), also known as Zamora's trench Battle ("Batalla del Foso de Zamora"), was a battle that occurred on August 5, 939 in the city of Zamora, Spain.
 The battle occurred when the troops of Abd-ar-Rahman III assaulted the walls of Zamora.
 The defending troops were those loyal to Ramiro II of León, King of the Kingdom of Leon.
 The fighting was so bloody that the tide of the battle did not turn until the ditch surrounding the city walls was entirely filled with corpses.
 The troops of Aberraman III won the day and were able to seize the city of Zamora.
 This battle should not be confused with the Day of Zamora ("Día de Zamora" or "Jornada del Foso de Zamora") which took place a few decades before in the year 901.
The Third Battle of Seoul, also known as the Chinese New Year's Offensive, the January–Fourth Retreat (Korean: 1•4 후퇴 ) or the Third Phase Campaign Western Sector (), was a battle of the Korean War, which took place from December 31, 1950 to January 7, 1951 around the South Korean capital of Seoul.
 In the aftermath of the major Chinese victory at the Battle of the Ch'ongch'on River, the United Nations Command started to contemplate the possibility of evacuation from the Korean Peninsula.
 Upon learning of this development, China's Chairman Mao Zedong ordered the Chinese People's Volunteer Army to cross the 38th parallel in an effort to pressure the United Nations forces to withdraw from South Korea.
The Battle of the Ch'ongch'on River, also known as the Battle of the Ch'ongch'on () or the Second Phase Campaign Western Sector (), was a decisive battle in the Korean War, and it took place from November 25 to December 2, 1950, along the Ch'ongch'on River Valley in the northwestern part of North Korea.
 In response to the successful Chinese First Phase Campaign against the United Nations forces, General Douglas MacArthur launched the Home-by-Christmas Offensive to evict the Chinese forces from Korea and to end the war.
 Anticipating this reaction, the Chinese People's Volunteer Army Commander Peng Dehuai planned a counteroffensive, dubbed the "Second Phase Campaign", against the advancing UN forces.
The Second Phase Campaign of the Korean War was an extended military offensive by the Chinese People's Volunteer Army during the last week of November, 1950, and the first two weeks of December.
 The two major engagements were battles near the Ch'ongch'on River in the Chinese-designated Western Sector and Chosin Reservoir in their Eastern Sector.
 The Chinese opposed United Nations-authorized forces composed of American military and various allied forces.
The Battle of Wawon (Turkish: "Kunuri Muharebeleri" ), also known as the Battle of Wayuan (), was a series of delay actions of the Korean War that took place from November 27–29, 1950 near Wawon in present-day North Korea.
 After the collapse of the US Eighth Army's right flank during the Battle of the Ch'ongch'on River, the Chinese 38th Corps advanced rapidly towards the critical road junction at Kunu-ri in an effort to cut off United Nations forces' retreat route.
 In what was considered to be Turkey's first real combat action since the aftermath of World War I, the Turkish Brigade attempted to delay the Chinese advances at Wawon.
 Although during the battle the Turkish Brigade was crippled after being encircled by Chinese forces with superior numbers, they were still be able to breach the Chinese trap and rejoin the US 2nd Infantry Division.
The Battle of Aldenhoven or Battle of the Roer (2 October 1794) saw a Republican French army commanded by Jean Baptiste Jourdan attack a Habsburg Austrian army under François Sébastien Charles Joseph de Croix, Count of Clerfayt which was defending the line of the Roer River.
 The key crossing was won by the French right wing at Düren after heavy fighting.
 The Austrian retreat from the Roer conceded control of the west bank of the Rhine River to France.
 The battle occurred during the War of the First Coalition, part of a wider conflict called the Wars of the French Revolution.
 Aldenhoven is located in the state of North Rhine-Westphalia in Germany about 21 km northeast of Aachen.
The Battle of Aachen was a major combat action of World War II, fought by American and German forces in and around Aachen, Germany, between 2–21 October 1944.
 The city had been incorporated into the Siegfried Line, the main defensive network on Germany's western border; the Allies had hoped to capture it quickly and advance into the industrialized Ruhr Basin.
 Although most of Aachen's civilian population was evacuated before the battle began, much of the city was destroyed and both sides suffered heavy losses.
 It was one of the largest urban battles fought by U.S. forces in World War II, and the first city on German soil to be captured by the Allies.
 The battle ended with a German surrender, but their tenacious defense significantly disrupted Allied plans for the advance into Germany.
Anju-si (] ) is a city in the South P'yŏngan province of North Korea, and is located at the coordinates of .
 Its population was 240,117 in 2008.
 The Ch'ongch'on River passes through Anju.
Taeryong River is a river of North Korea.
 The river is a tributary of the Ch'ongch'on River.
The Eighth Army Ranger Company, also known as the 8213th Army Unit, was a Ranger light infantry company of the United States Army that was active during the Korean War.
 As a small special forces unit, it specialized in irregular warfare.
 Intended to combat the North Korean (NK) commandos who had been effective at infiltration and disruption behind United Nations (UN) lines, the Eighth Army Ranger Company was formed at the height of the Battle of Pusan Perimeter in September 1950 and was the first U.S. Army Ranger unit created since World War II.
 The company went into action as a part of the 25th Infantry Division during the UN advance into North Korea in October and November.
 It was best known for its defense of Hill 205 against an overwhelming Chinese attack during the Battle of the Ch'ongch'on River which resulted 41 of the 51 Rangers becoming casualties.