War can impact the society in many ways some are good andhelpful while some are not. Wars can be caused in many wayssuch as religious reasons or to be independent from anothercountry or because they just want more land. Such as theRevolutionary war they caught to get independence from theBritain since they gave the US extra taxes to pay for thatthey didn’t have to pay for. Also in the Battle Of Normandyalso known as The Operation Overlord was a campaign in 1944with the allies to invade Europe.Why was The Revolutionary War fought? The reason is thatBritain made so many acts to pay for the French and Indianwar. The acts including the sugar act which was an act whenthey had to pay 6 pence extra for each gallon of sugar.Following that was passed the stamp act which the US had topay for each official papers, documents (birth certificate,death certificate, marriage papers, etc.) so all these andmany more acts lead up to the war. Another thing that lead upto the war was that the US government didn’t have the rightto go to Britain and vote for the acts and laws passed.In this essay I will be talking about the battle of Lexingtonand Concord.The British were planning to go to Lexington andConcord to capture Sam Adams and John Handcock, and then takethe ammunition. But the spies and the British friends ofAmericans warned them about the secret attack so theAmericans had time to hide their ammunition. Horse riderslike Paul Revere went to warn the others. There is a myththat they shouted the British are coming but this could haveconfused some since they considered themselves British. Asexpected at about 5 in the morning the 700 British soldierscame. At dawn there were shots fired and the first shot wasknown as “The Shot Heard Around The World” must’ve been alarge cannon or something right well that’s exactly what itwas not. The Shot Heard Around The World was a shot that wasmysteriously fired during the battle which went viral… on thenewspaper. After that the Americans were forced to retreatand the British went on to concord just to come out emptyhanded For the British, 73 were killed, 174 were wounded, and26 were missing.Paul Revere wrote about the war saying “Weset off for Concord, and were overtaken by a young gentlemannamed Prescot, who belonged to Concord, and was going home.When we had got about half way from Lexington to Concord, the other two stopped at a house to awake the men, I kept along….In an instant I saw four of them, who rode up to me withtheir pistols in their bands, said , stop. If you go an inchfurther, you are a dead man.” At in instant Mr. Prescot cameup. We tried to get through them, but they kept before us,and swore if we did not turn in to that pasture, they wouldblow our brains out, (they had placed themselves opposite toa pair of bars, and had taken the bars down). They forced usin. When we had got in, Mr. Prescot said “Put on!” He took tothe left, I to the right … Just as I reached it, out startedsix officers, took my harness, put their pistols to mycheast, ordered me to dismount, which I did. While thecolonists lost many minutemen the battle was considered a bigvictory.Wait who were minutemen? The minutemen were colonistsfrom the military who were trained in weaponry, tactics, andmilitary strategies. In the other hand the British wereplanning a act called the Conciliatory Proposition that willalleviate, or make the taxing less severe and replacing thetaxes to a “voluntary contributions”. By the time theyreleased the act the Battle Of Lexington and Concord hadoccurred and the revolution had been stirring for some time and tension had been rising so the act was rejected. WilliamPitt was pleased to see that the colonists were doingeverything they can to get their independence, but While William Pitt was pleased Thomas Gage was shocked. Thenlater when the colonists were celebrating at Lexington andConcord Thomas Gage was sent back to England. Later JosephWarren quoted “Nevertheless, to the persecution and tyrannyof his cruel ministry we will not tamely submit – appealingto Heaven for the justice of our cause, we determine to dieor be free.””Battles of Lexington and Concord.” Wikipedia, WikimediaFoundation, 9 Jan. 2018,en.m.wikipedia.org/wiki/Battles_of_Lexington_and_Concord.On June 6 1944 now known as the D-Day, the future presidentDwight D. Eisenhower who was a supreme commander of theAllied Expeditionary Forces in World War II gave direction togo and invade Europe which was called the Operation Overlord.Invading another nation may sound like a cruel thing but inthis case the reason for the invasion was done with a good intention… hopefully, well the causes of the battle was that they wanted to take Germany from Hitler’s’ Nazi army in Western Germany. Hitler was not a good ruler he killed Jews in concentration camps and there were so many chaos’s in Germany. So by the first week of June 1944 the allied forces were poised to travel by ship or plane over the english channel to attack the Germans army at Normandy. on June 5. President Roosevelt had a window of best 4 days of respectable weather in which an invasion could be possible. whilst horrific weather hitting the transmission channel on June 4, Eisenhower wrestled with the melodic theme of suspending Operation Overlord. weather climate have been expected to get worse over the following workweek and he had 1000 of employees and thousands of lots of provision that have been in his words, hanging at the cease of a department . After a promising but cautious report from his meteorologist at 9:45 p.m. on June 5, Eisenhower told his body of workers that they have to go. At that night their allies at England made an inspiring statement which arrived the following day to each and every fighter(soldiers navy’s sailor etc). Also on the radio delivery of the message he triedtogiveallthefightersthefeelingofc onfidenceand leadership . He reminded that everybody in the world was counting on them and also reminded them that their opponents were not going to show any mercy and will fight with cruelty and told them to be brave and show how devoted they are to protect their country and to not accept anything other than the victory of their country. And at last he wished them a good luck and seeked God’s blessing on this noble undertaking. This was an amazing speech but like that wasn’t enough he also scribbled down a note that no one noticed that if this mission failed he was responsible for the things that happened, meaning he took all the blame if they failed the mission. While at the White House President Roosevelt awaited thestartoftheOperationOverlord.AccordingtoD oris Kearns Goodwin in  No Ordinary Time , Roosevelt wanted to be in England with Churchill and Eisenhower for the important event, The Operation Overlord, but with his health declining his trip to England would have been impossible or nearly impossible. Instead he just sat in his office trying to finish up the speech he was going to say when the war began as his sons and daughters suggested. Instead he made a prayer. Later that night at 3 AM he was notified that the war had begun and called the radio stations and told them to broadcast a prayer for the soldiers that were on war atEurope. Some time later on June 11 1944 the beaches were fullof 326,000 troops, more than 50,000 vehicles and some 100,000tons of equipment had landed at Normandy. The Germanssuffered a lot on their part since they were celebratingcommander Rommel who was taking time off of the military.Also Hitler believed that the war was just a hoax trying todistract the Germans from a coming attack north of the SeineRiver so he had refused to send nearby troops to fightagainst the troops coming from The United States and sentreinforcement from far parts which had caused delays. He alsodidn’t want to call armoured forces. America’s allies helpedthe US by air attacks and took down some main bridges whichforced the Germans to take detours and naval support fromtheir allies. After many weeks the American allies foughtthrough Normandy to the Germans who were not giving up andresisting. By the end of June the allies had already seized agreat portion of Cherbourg including 850,000 men and 150,000vehicles in Normandy and continued marching through France.By the end of August American Allies had reached The SeineRiver and completely took out Hitler’s Army,Nazi, in theNorthwest of France which concluded the Battle of Normandy (operation overlord). The Allies then prepared to enterGermany to meet with the Soviet allied forces that weremoving in from the east. The invasion then went againstHitler’s army the Nazis. It was a great psychological blow,also Hitler couldn’t send any troops from France to build theEastern Front to advance against the soviet union. Thefollowing year on May 8 the Americans accepted aunconditional surrender from the Nazis. Also a week earlierHitler had commited suicide, it was surely a victory for theAmericans.General Dwight D. Eisenhower launches Operation Overlord.(n.d.). Retrieved January 10, 2018, fromhttp://www.history.com/this-day-in-history/general-dwight-d-eisenhower-launches-operation-overlordHistory.com Staff. (2009). D-Day. Retrieved January 1, 2018,from http://www.history.com/topics/world-war-ii/d-dayThese wars would not be possible without the help of sciencebut what scientific advances did they have on these wars.”Sea,” said King Canute, the 11th-century Danish King ofEngland, “I command you to come no further!”. As we all knownone of us can control the sea but could we tell how the sea   moves and the tide levels? It’s not enough to remember howthey fought but how science contributed to these victories.For any war the sailors have to determine how tall the tideswill be is very crucial which the United States Army learnedin The Battle of Tarawa when the traveled in the PacificOcean. A miscalculation left the US stranded and the Japaneselets say used them as target practice. Predicting ocean tidesis not as easy as you might think, a professor who taughtundergraduates says I can testify to just how complex, evencounterintuitive, this science is. About at the 17 centuryIsaac Newton stated that the ocean tides were dependant onthe earth’s sun’s and moon’s gravitational pull. To determinethe tides even with Newton’s statement I just told you aboutit will still be very difficult. Why? The reason is that theEarth has different and also changing angles. Water reacts togravity strongly and the closest side to the moon is going tohave a bulge, while on the other side of earth the waterstays as a calm thin layer. Since the Earth also is pulledtowards the Moon the waves could grow even more. Just imaginewaves moving as earth rotates. Science is not only used todetermine the waves but could also be used science was alsoused for mustard gas also used for ww2. Mustard Gas or SulfurMustard, Mustard gas can cause irritation in eyes sometimes short term blindness, diarrhea and breathing problems. O’Connell, S. (2014, June 06). The Science Behind the Normandy Landing on D-Day. Retrieved January 16, 2018, from http://www.slate.com/articles/health_and_science/science/2014/ 06/d_day_normandy_landing_science_the_army_navy_compromise_on_ tides_and_timing.html